Floral ring (3)
'floral ring' 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 "change in E. Europe" , "Hawaiian garland - Romanian money" , "Floral necklace" , "Flower arrangements" , "Bloomers on line" .)
(Other definitions for wreath that I've seen before include "Circlet (of laurel)" , "Circle of flowers in honour of dead" , "Festive garland" , "A circle made of flowers and leaves" , "Circular band of flowers and leaves, often seen on graves" .)