Do go (4)
I believe the answer is:
bash
This clue is a double definition.
'do' is the first definition.
('bash' can be a synonym of 'do')
'go' is the second definition.
(I've seen this before)
(Other definitions for bash that I've seen before include "Go" , "social occasion" , "Heavy blow; party" , "Dent - party" , "Strike hard; party" .)