Party, celebration (5)
I believe the answer is:
beano
I believe this is a double definition.
'party' is the first definition.
(I've seen this before)
'celebration' is the second definition.
(I've seen this before)
(Other definitions for beano that I've seen before include "binge" , "Rowdy jollification" , "Enjoyable party" , "Celebration" , "Comic - party" .)