Prepare company fine (4)
I believe the answer is:
cook
'prepare' is the definition.
(synonyms)
'company fine' is the wordplay.
'company' becomes 'co' (abbreviation).
'fine' becomes 'ok' (synonyms).
'co'+'ok'='COOK'
(Other definitions for cook that I've seen before include "Heat food" , "Famous sailor" , "Doctor" , "Kitchen worker" , "Falsify - chef" .)