Dance at a luau (4)
I believe the answer is:
hula
'dance at a luau' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hula that I've seen before include "Hip-swaying dance of Hawaii" , "Hawaiian dance - kind of hoop" , "Hoop spun around the body" , "Hawaiian rain dance" .)