Teen dance (4)
I believe the answer is:
prom
'teen dance' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for prom that I've seen before include "Formal dance at the end of school year" , "Seaside walk (abbr.)" , "BBC summer concert" , "Albert Hall concert" , "Concert - school dance (US)" .)