Party givers (5)
I believe the answer is:
hosts
'party givers' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hosts that I've seen before include "They invite and entertain guests" , "Great numbers of party-givers" , "People who entertain" , "Great numbers of those who entertain?" , "Landlords" .)