Garland formed from buddleia (3)
I believe the answer is:
lei
'garland' is the definition.
(synonyms)
'from buddleia' is the wordplay.
'from' says the answer is hidden in the clue.
'LEI' is hidden in the letters of 'buddleia'.
'formed' is the link.
(Other definitions for lei that I've seen before include "Flowers worn round the neck" , "Hawaiian necklace of flowers" , "cash for Romanians" , "show of affection?" , "Flower arrangements" .)