Drink on top of wardrobe featured in feast (3,4)
I believe the answer is:
red wine
'drink' is the definition.
(red wine is a kind of drink)
'on top of wardrobe featured in feast' is the wordplay.
'on' becomes 're' ('on' can be mean 'with reference to').
'top of' says to take the initial letters.
'featured in' indicates putting letters inside.
'feast' becomes 'dine'.
The initial letter of 'wardrobe' is 'w'.
'w' going within 'dine' is 'dwine'.
're'+'dwine'='RED WINE'
(Other definitions for red wine that I've seen before include "Such as Shiraz or Merlot" , "Tent, say" , "Merlot or Malbec, say" , "Burgundy perhaps" , "Eg, claret" .)