Fragrant neckwear (3)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fragrant neckwear</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lei that I've seen before include "Band of flowers" , "Necklace of tropical flowers" , "Hawaiian wreath" , "Floral decoration" , "Flowers worn round the neck" .)