Flubs

15 clues
Blows
Muffs
Errors
Botches
Bungles
Mistakes
Blunders
Slips up
Bad line readings
Reasons for retakes
Blooper-reel segments
Blows, as one's lines
Blows, as a script line
Contents of many outtakes
Blows a line on stage, e.g.
Similar answers:
Abelgianwaffles
Acamouflagesuit
Aceofclubs
Acornflakes
Actoflove
Actoflying
Addingfueltotheflames
Adobeflashplayer
Adogofflanders
Aeonflux
Aeroflot
Afeastoflights
Affleck
Afflict
Afflicted
Afflictedand
Afflicts
Afflictthe
Affluence
Affluent