Versatile stage director prospers (4,5)
I believe the answer is:
gets ahead
'prospers' is the definition.
('get ahead' can be a synonym of 'prosper')
'versatile stage director' is the wordplay.
'versatile' is an anagram indicator.
'director' becomes 'head' (I can't justify this - if you can you should give a lot more credence to this answer).
'stage' with letters rearranged gives 'getsa'.
'getsa'+'head'='GETS AHEAD'
Can you help me to learn more?
(Another definition for gets ahead that I've seen is " Takes the lead".)