Overwhelming victory right away? (4)
I believe the answer is:
rout
'overwhelming victory' is the definition.
(I've seen this before)
'right away?' is the wordplay.
'right' becomes 'r' (common abbreviation).
'away?' becomes 'out' ('out' can be similar in meaning to 'away').
'r'+'out'='ROUT'
(Other definitions for rout that I've seen before include "snore" , "Put to flight on tour" , "Put to flight, disperse" , "Defeat thoroughly" , "Devastating defeat" .)