Party attempt a big hit (4)
I believe the answer is:
bash
I believe this is a triple definition!
'party' is the first definition.
(term for a party or celebration)
'attempt' is the second definition.
(I've seen this before)
'a big hit' is the third definition.
(I've seen this in another clue)
(Other definitions for bash that I've seen before include "Shindig, function" , "Strike hard; party" , "Dent - party" , "Hit hard; party (slang)" , "Strike violently" .)