Fault wicked in heroic sailor (6)
I believe the answer is:
sinbad
'heroic sailor' is the definition.
'Sinbad' can be an answer for 'sailor' (I've seen this before). I'm not sure about the 'heroic' bit.
'fault wicked' is the wordplay.
'fault' becomes 'sin' (I've seen this in another clue).
'wicked' becomes 'bad' (associated in meaning).
'sin'+'bad'='SINBAD'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for sinbad that I've seen before include "Arabian Nights sailor who made seven voyages" , "Literary sailor" , "Adventurous sailor of Arabian Nights or pantomime" , "The 1001 Nights sailor" , "Sailor of Eastern tale" .)