Ready-to-wear accessory? (5,4)
I believe the answer is:
money belt
'accessory?' is the definition.
(money belt is a kind of accessory)
'ready-to-wear' is the wordplay.
'ready' becomes 'money' (I've seen this before).
'to wear' becomes 'belt' (belt is a kind of wear).
'money'+'belt'='MONEY BELT'
(Other definitions for money belt that I've seen before include "bucks are safe in it" , "Item worn to counter pickpockets" , "Cash concealer" .)