Maori ceremonial war dance (4)
I believe the answer is:
haka
'maori ceremonial war dance' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for haka that I've seen before include "Maori ceremonial war-dance" , "Maori ceremonial war dance" , "Maori challenge to combat" , "pre-match ritual" , "intimidatory chant" .)