Ring of flowers put down we're told (3)
I believe the answer is:
lei
'ring of flowers' is the definition.
(I've seen this before)
'put down we're told' is the wordplay.
'put down' becomes 'lay' (lay something down).
'we're told' shows a homophone (sound like).
'lay' sounds like 'LEI'.
(Other definitions for lei that I've seen before include "Garland of flowers, may accompany 5 Down" , "What Romanians spend" , "Hawaiian necklace of flowers" , "Polynesian garland of flowers" , "Floral decoration" .)