Green dress? Just the top is worn (5)
I believe the answer is:
jaded
'worn' is the definition.
('jade' can be a synonym of 'wear')
'green dress?' is the wordplay.
'green' becomes 'jade' (jade green is a kind of green).
'dress?' becomes 'd' (this could be a standard abbreviation which I don't know about).
'jade'+'d'='JADED'
'just the top is' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for jaded that I've seen before include "Decadent or worn out" , "Very tired or bored stiff" , "Worn out or bored" , "Spent" , "Fed up or weary" .)