Try; hit; party (4)
I believe the answer is:
bash
I believe this is a triple definition!
'try' is the first definition.
(I've seen this before)
'hit' is the second definition.
(bashing is a kind of hitting)
'party' is the third definition.
(term for a party or celebration)
(Other definitions for bash that I've seen before include "Strike hard; party" , "Party; beat" , "Go" , "Break - party" , "Smite; a party" .)