Dance in rehearsals afterwards (5)
I believe the answer is:
salsa
'dance' is the definition.
(I've seen this before)
'in rehearsals afterwards' is the wordplay.
'in' indicates the answer is hidden within the clue.
'SALSA' is hidden in the letters of 'rehearsals afterwards'.
(Other definitions for salsa that I've seen before include "Latin American dance music" , "Spicy 7" , "Saucy dance" , "Cuban dance music or spicy sauce" , "fling?" .)