Work for each model (7)
I believe the answer is:
perform
'work' is the definition.
(thesaurus)
'each model' is the wordplay.
'each' becomes 'per'.
'model' becomes 'form' (both can mean to mould or shape).
'per'+'form'='PERFORM'
'for' acts as a link.
(Other definitions for perform that I've seen before include "Act or execute" , "Act - accomplish" , "Carry out (a task)" , "Do a good job" , "seen to make a profit?" .)