Greek worker's allowance (5)
I believe the answer is:
grant
'allowance' is the definition.
(thesaurus)
'greek worker's' is the wordplay.
'greek' becomes 'gr'.
'worker' becomes 'ant' (worker is a type of ant).
'gr'+'ant'='GRANT'
(Other definitions for grant that I've seen before include "Bestow; bursary" , "FILMSTAR" , "Allow (something)" , "yield" , "Present" .)