Have legal support groups succeeded? (7)
I believe the answer is:
possess
'have' is the definition.
(I know that possess is a more specific form of the action have)
'legal support groups succeeded?' is the wordplay.
'legal support groups' becomes 'posses' (posse can mean a group of lawmen).
'succeeded?' becomes 's' (genealogical abbreviation).
'posses'+'s'='POSSESS'
(Other definitions for possess that I've seen before include "Consume" , "Have as one's own" , "Have - control" , "Have and hold" , "Own, keep" .)