Band's engagement (3)
I believe the answer is:
gig
'band's engagement' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for gig that I've seen before include "Date" , "A palindromic one-night performance" , "One-horse carriage" , "Horse carriage - performer's single booking" , "A palindromic single performance" .)