A party put down (5)
I believe the answer is:
abash
'put down' is the definition.
(thesaurus)
'a party' is the wordplay.
'party' becomes 'bash' (bash is a kind of party**).
'a'+'bash'='ABASH'
(Other definitions for abash that I've seen before include "Strike with embarrassment" , "Discomfit" , "Crush" , "Rattle" , "Affront" .)