Sponsorship a pro agent sorted out (9)
I believe the answer is:
patronage
'sponsorship' is the definition.
(I've seen this before)
'a pro agent sorted out' is the wordplay.
'sorted out' is an anagram indicator.
'a'+'pro'+'agent'='aproagent'
'aproagent' anagrammed gives 'PATRONAGE'.
(Other definitions for patronage that I've seen before include "The power to control privileges" , "supporting role" , "custom in restaurant?" , "Condescension" , "Support" .)