A flower adorning garment for recipient (9)
I believe the answer is:
addressee
'for recipient' is the definition.
(addressee is a kind of recipient)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for addressee that I've seen before include "He gets a letter" , "One sent letter" , "One contacted" , "The person to whom letter is delivered" , "Person named on an envelope" .)