Respecting wedding party (7)
I believe the answer is:
reunion
'party' is the definition.
(reunion is a kind of party)
'respecting wedding' is the wordplay.
'respecting' becomes 're' (regarding).
'wedding' becomes 'union' (I've seen this before).
're'+'union'='REUNION'
(Other definitions for reunion that I've seen before include "(E.g. annual) get-together" , "Event where old friends meet" , "part of France" , "French here are isolated" , "Gathering of old friends, colleagues etc" .)