Bread and veg out (4)
I believe the answer is:
loaf
I believe this is a double definition.
'bread' is the first definition.
(loaf is a kind of bread)
'veg out' is the second definition.
(I've seen this before)
'and' is the link.
(Other definitions for loaf that I've seen before include "bloomer, perhaps" , "Pass time idly" , "Bread; loiter" , "Half of one is better than none" , "To take things easy" .)