Local worker to exclude male assistance (7)
I believe the answer is:
barmaid
'local worker' is the definition.
(worker in a local, ie a pub)
'exclude male assistance' is the wordplay.
'exclude' becomes 'bar' (synonyms).
'male' becomes 'm' (common abbreviation).
'assistance' becomes 'aid' (synonyms).
'bar'+'m'+'aid'='BARMAID'
'to' is the link.
(Other definitions for barmaid that I've seen before include "She serves drinks" , "Pub girl" , "Local girl" , "Pub employee" , "Pub worker" .)