Theatrical party (4)
I believe the answer is:
camp
I believe this clue is a double definition.
'theatrical' is the first definition.
(I've seen this before)
'party' is the second definition.
(both can mean a group of people)
(Other definitions for camp that I've seen before include "Distance down" , "Foppish" , "Where erections are temporary" , "Hill fort; extravagantly theatrical" , "holiday location" .)