Arguable

6 clues
Doubtful
Debatable
Up for debate
Open to question
Not quite self-evident
Capable of being debated
Similar answers:
Abatable
Abdicable
Able
Ablebaker
Ablebodied
Abled
Ablepersonality
Abler
Ableseaman
Ableseamen
Ablest
Ableto
Abletoreadallis
Abletotakeajoke
Ablewas
Ablewasier
Abominable
Abominablesnowman
Abuyablealternative
Acceptable