Afro-Cuban drum (5)
I believe the answer is:
'afro-cuban drum' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for conga that I've seen before include "Circuitous line dance" , "What gets line moving rhythmically" , "Latin-American dance" , "Cuban dance of three steps followed by a kick" , "Single-file dance" .)