Adorn part of ship (4)
I believe the answer is:
deck
I believe this is a double definition.
'adorn' is the first definition.
(decking is a kind of adorning)
'part of ship' is the second definition.
('deck' is part of 'ship')
(Other definitions for deck that I've seen before include "Dress; floor; cards" , "Adorn; level on ship" , "Pack - part of record player" , "Ship's platform" , "Set of cards" .)