Parties with exhibitors (7)
I believe the answer is:
showers
I believe this clue is a double definition.
'parties' is the first definition.
(shower is a kind of party)
'exhibitors' is the second definition.
'with' acts as a link.
(Other definitions for showers that I've seen before include "Demonstrators" , "Brief rainfalls" , "Short falls of rain" , "Exhibitionists" , "Spots of rain" .)