Giving party attended by group of people (8)
I believe the answer is:
donation
'giving' is the definition.
(donation is a kind of giving)
'party attended by group of people' is the wordplay.
'party' becomes 'do' (do is a kind of party).
'attended by' is a charade indicator (letters next to each other).
'group of people' becomes 'nation'.
'do'+'nation'='DONATION'
(Other definitions for donation that I've seen before include "present" , "An offering or charitable gift" , "Gift or contribution" , "presentation" , "Do anoint by way of a gift" .)