Performer in Rwandan ceremony (6)
I believe the answer is:
dancer
'performer' is the definition.
(dancer is a kind of performer)
'in rwandan ceremony' is the wordplay.
'in' indicates the answer is hidden within the clue.
'DANCER' can be found hidden inside 'rwandan ceremony'.
(Other definitions for dancer that I've seen before include "Mover to music" , "See 25" , "Terpsichorean" , "behind Rudolph" , "One moves to music" .)