With spirit a sailor gets up to dance (5)
I believe the answer is:
'dance' is the definition.
(I know that rumba is a type of dance)
'with spirit a sailor gets up' is the wordplay.
'with' is a charade indicator (letters next to each other).
'spirit' becomes 'rum' (alcoholic spirit).
'a sailor' becomes 'ab' (abbreviation for able seaman).
'gets up' says the letters should be written backwards.
'ab' written backwards gives 'ba'.
'rum' next to 'ba' is 'RUMBA'.
'to' acts as a link.
(Other definitions for rumba that I've seen before include "What to perform" , "one's on the floor for it" , "Burma (anag)" , "Style of dance" , "Cuban folk-dance" .)