Success coming as result of complete change? (5,5)
I believe the answer is:
clean sweep
'success' is the definition.
'complete change?' is the wordplay.
'complete' becomes 'clean' ('clean' can be similar in meaning to 'complete').
'change?' becomes 'sweep' (sweep is a kind of change**).
'clean'+'sweep'='CLEAN SWEEP'
'coming as result of' is the link.
(Other definitions for clean sweep that I've seen before include "That's when you get everything going" , "Complete achievement of objectives" , "Complete change; winning all the trophies" .)