Finish in trade for local worker (9)
I believe the answer is:
bartender
'local worker' is the definition.
(I've seen this before)
'finish in trade' is the wordplay.
'finish' becomes 'end' (synonyms).
'in' is an insertion indicator.
'trade' becomes 'barter' (synonyms).
'end' inserted into 'barter' is 'BARTENDER'.
'for' is the link.
(Other definitions for bartender that I've seen before include "Local worker" , "local employee" , "Taverner" , "Pub worker" , "Pub employee" .)