- One fifth of a fiver
- One-fifth of a franc in Albania.
- One-fifth of a limerick
- One fifth of an ABBA hit
- One-fifth of any limerick
- One-fifth of CCCV
- One-fifth of CCLX
- One-fifth of CCLXV
- One-fifth of cinquante
- One-fifth of DLV
- One fifth of DX
- One-fifth of DXV
- One fifth of DXXX
- One fifth of DXXXV
- One fifth of "Hamlet
- One-fifth of humankind
- One-fifth of "If music be the food of love, play on
- One-fifth of "Macbeth
- One-fifth of MD
- One-fifth of MDXXV
- One-fifth of MMCCLV
- One-fifth of MMDX
- One-fifth of MML
- One-fifth of MMMDV
- One-fifth of MMMV
- One-fifth of MMMXXV
- One-fifth of MMV
- One-fifth of MMXV
- One-fifth of MMXX
- One-fifth of MV
- One-fifth of MXX
- One-fifth of Papa Dionne's surprise
- One-fifth of two bits
- One-fifth of XV
- One fighting a losing battle?
- One fighting back
- One fighting for a cause
- One fighting something
- One fighting urban sprawl, say
- One filled with animus
- One filled with hate
- One filling in at work?: Abbr.
- One filling out personnel forms, say
- One filling the bill?
- One finally done with finals?
- One finding something
- One fine Day
- One Fine Day" is one
- ''One Fine Day'' singer
- One Fine Summer Morning" singer Sands
- One finishing a donut
- One finishing a sentence
- One finishing desserts
- One finishing off the cake
- One finishing second?
- One finishing with fewer points
- One, five or 10, e.g.
- One, five or ten, e.g.
- One fixing a Time piece?
- One fixing holes, maybe
- One fixing things around the house
- One flavor in Sprite
- One fleeing a flood, maybe
- One fleeing a land
- One fleeing persecution
- One fleeing persecution, perhaps
- One fleeing persecution, say
- One Flew Over . . ." author
- One Flew Over the Cuckoo's ---
- One Flew Over the Cuckoo's Nest" author
- One Flew Over the Cuckoo's Nest" author Ken
- One Flew Over the Cuckoo's Nest" author Kesey
- One Flew Over the Cuckoo's Nest" novelist
- One Flew Over the Cuckoo's Nest" novelist Ken
- One Flew Over the Cuckoo's Nest" novelist Kesey
- One Flew Over the Cuckoo's Nest" tyrant
- ''One Flew Over the Cuckoo's Nest'' writer
- One flooding the streets circa 1890
- One floundering in strange surroundings
- One flu source
- One fluent in Java and Klingon, maybe
- One flying at a leisurely pace
- One flying over Hawaii
- One focused on minor offenses
- One Fodor's guide
- One followed by 100 zeros
- One followed by 15 zeroes
- One followed by 15 zeros
- One followed by 18 zeros
- One followed by 30 zeros
- One followed by 33 zeros
- One followed by an Islamic Twelver
- One followed by many
- One followed on horseback
- One follower?
- One following a bellwether, maybe
- One following a course
- One following an order
- One following statutes to the letter
- One fond of dining on tongue?
- One foot
- One foot in a line
- One-foot jumps
- One foot, to a poet
- One-footed jump
- One-footed jumps
- One-footer, say, in golf
- One for ___
- One for a dollar
- One for all and all for one," e.g.
- One, for Angus
- One for each hand
- One, for Fritz
- One, for lithium
- One, for little ones
- One for My Baby" composer
- One for My Baby" composer Harold
- One for My Baby" singer
- One, for one
- One, for some
- One for the books?
- One for the books? (abbr.)
- One for the books," for one
- One for the history books
- One for the money
- One for the plus column
- One for the record books?
- One for the road?
- One for the road" offense, briefly
- One-for-the-road time
- One for the roadie
- One for the team?
- One, for two
- One-for-two deal?
- One for war?
- One for whom a flash in the pan is a good thing
- One for whom a street may be named
- One for whom all roads lead to roam
- One for whom Apr. is the cruelest month?
- One for whom "hello" is "hej
- One for whom many angles may be right?
- One for whom Nome may be home
- One for whom play means work
- One for whom ransom may be paid
- One for whom the chips are down
- One for whom the play's the thing
- One for whom there's no hope
- One for whom work is play?
- One for Wilhelm