Pitch into a sailor (3)
I believe the answer is:
tar
I believe this clue is a double definition.
'pitch' is the first definition.
(I know that pitch can be written as tar)
'a sailor' is the second definition.
(slang term for a sailor)
'into' is the link.
(Other definitions for tar that I've seen before include "prepare for feathers?" , "'Thick, dark, sticky liquid (3)'" , "Thick, sticky liquid distilled from coal" , "Product of smoking cigarettes" , "Old salt or liquid from coal" .)