Tell me to get the better of winner (3,4,2)
I believe the answer is:
out with it
'tell me' is the definition.
(I've seen this before)
'get the better of winner' is the wordplay.
'get the better of' becomes 'outwit' (both can mean to outsmart).
'winner' becomes 'hit' (both can mean a successful creative venture).
'outwit'+'hit'='OUT WITH IT!'
'to' acts as a link.
(Other definitions for out with it that I've seen before include "divulge information immediately!" , "Go on" , "Say what you think" , "Squeal" , "Tell me quickly" .)