Grass and booze covering food carrier (8)
I believe the answer is:
betrayer
'grass' is the definition.
(I've seen this before)
'booze covering food carrier' is the wordplay.
'booze' becomes 'beer'.
'covering' means one lot of letters goes inside another.
'food carrier' becomes 'tray' (I've seen this in another clue).
'beer' going around 'tray' is 'BETRAYER'.
'and' acts as a link.
(Other definitions for betrayer that I've seen before include "traitor" , "grass" , "One who is treacherous" , "Eg Judas Iscariot" , "snake" .)