Is able to be a bit buccaneering (3)
I believe the answer is:
can
'is able to' is the definition.
(I've seen this before)
'be a bit buccaneering' is the wordplay.
'be a bit' says the answer is hidden in the clue (the answer is formed by a bit of the clue).
'CAN' can be found hidden inside 'buccaneering'.
(Other definitions for can that I've seen before include "Vessel" , "John" , "(Tin) container" , "Cooler" , "let go in the US" .)