Muumuu accessory (3)
I believe the answer is:
lei
'muumuu accessory' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lei that I've seen before include "Blooming string" , "Flower arrangements" , "Band of flowers" , "Garland of flowers in Hawaii" , "Honolulu chain of flowers" .)