Dance sailor rejected after drink (5)
I believe the answer is:
rumba
'dance' is the definition.
(rumba is a type of dance)
'sailor rejected after drink' is the wordplay.
'sailor' becomes 'ab' (abbreviation for able seaman).
'rejected' is a reversal indicator.
'after' says to put letters next to each other.
'drink' becomes 'rum' (rum is a kind of drink).
'ab' reversed gives 'ba'.
'ba' after 'rum' is 'RUMBA'.
(Other definitions for rumba that I've seen before include "Strictly round" , "music one can dance to" , "Afro-Cuban or ballroom dance" , "Umbra (anag)" , "Burma (anag)" .)