Submit reward for audience initiative (10)
I believe the answer is:
enterprise
'initiative' is the definition.
(synonyms)
'submit reward for audience' is the wordplay.
'submit' becomes 'enter' (as in to submit something to a competition).
'reward' becomes 'prize' (I've seen this before).
'for audience' indicates a 'sounds like' (homophone) clue.
'prize' is a homophone of 'prise'.
'enter'+'prise'='ENTERPRISE'
(Other definitions for enterprise that I've seen before include "Get-up-and-go - venture" , "business concern" , "New project" , "Bold resourcefulness" , "Plan" .)