Dance in rehearsal, samba (5)
I believe the answer is:
salsa
'dance' is the definition.
(I've seen this before)
'in rehearsal samba' is the wordplay.
'in' indicates the answer is hidden within the clue.
'SALSA' is hidden in the letters of 'rehearsal samba'.
(Other definitions for salsa that I've seen before include "Spicy tomato sauce" , "Dance or a dip?" , "This could be hot" , "Chilli sauce" , "The Latin-American sound" .)