Platform to adorn (4)
I believe the answer is:
deck
I believe this clue is a double definition.
'platform' is the first definition.
(deck is a kind of platform)
'adorn' is the second definition.
(decking is a kind of adorning)
'to' is the link.
(Other definitions for deck that I've seen before include "Ship's flooring; pack" , "Adorn; card pack" , "Pack - embellish - ship's floor" , "Pack of cards (US)" , "Pack - part of record player" .)