Dance in a gym (4)
I believe the answer is:
prom
(Other definitions for prom that I've seen before include "Henry Wood concert" , "Esplanade" , "US high school dance" , "Concert; US college dance" , "hop" .)
I believe the answer is:
prom
(Other definitions for prom that I've seen before include "Henry Wood concert" , "Esplanade" , "US high school dance" , "Concert; US college dance" , "hop" .)