Oahu souvenir (3)
I believe the answer is:
lei
'oahu souvenir' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lei that I've seen before include "Flower garland of Hawaii" , "Hawaiian flower garland" , "Hawaiin flower garland" , "neck decoration" , "Polynesian garland of flowers" .)