Buccaneer's bud (5)
I believe the answer is:
matey
'buccaneer's bud' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for matey that I've seen before include "Friendly, sociable" , "Close chum (slang)" , "Sunshine" , "uncomfortably friendly" , "Chummy" .)