Bachelor attending quiet party (4)
I believe the answer is:
bash
'party' is the definition.
(I've seen this before)
'bachelor attending quiet' is the wordplay.
'bachelor' becomes 'ba' (the qualification: Bachelor of Arts).
'attending' says to put letters next to each other.
'quiet' becomes 'sh'.
'ba'+'sh'='BASH'
(Other definitions for bash that I've seen before include "Shindig, function" , "Party - clobber" , "Strike violently" , "Batter" , "social occasion" .)