Possibly bent, as a candle might be said to be (6)
I believe the answer is:
wicked
I believe this clue is a double definition.
'possibly bent' is the first definition.
(bent can mean corrupt)
'as a candle might be said to be' is the second definition.
(a candle has a wick)
(Other definitions for wicked that I've seen before include "Morally bad or wrong" , "very likely to cause harm" , "[SMASHING, COOL, DANDY]" , "A candle is" , "Ungodly; excellent (sl.)" .)