Each solicitor to patronise restaurant (3,3)
I believe the answer is:
eat out
'to patronise restaurant' is the definition.
(to eat out is to give custom to a restaurant)
'each solicitor' is the wordplay.
'each' becomes 'ea'.
'solicitor' becomes 'tout' (I've seen this before).
'ea'+'tout'='EAT OUT'
(Other definitions for eat out that I've seen before include "Dine in restaurant rather than home" , "Use a restaurant" , "Have it in cafe" , "'Don't dine at home (3,3)'" , "Lunch in pub?" .)