Party clobber (4)
I believe this clue is a double definition.
'party' is the first definition.
(term for a party or celebration)
'clobber' is the second definition.
(I know that clobber can be written as bash)
(Other definitions for bash that I've seen before include "Strike hard; party" , "box" , "Batter" , "Strike violently" , "social occasion" .)
This clue is a double definition.
'party' is the first definition.
(thrash can informally mean a party)
'clobber' is the second definition.
(both can mean to hit)
(Other definitions for thrash that I've seen before include "Beat thoroughly or make wild movements" , "Administer severe beating to" , "Best" , "Hit hard" , "Flog; party" .)