For one given award, knocked back drink (6)
I believe the answer is:
eggnog
'drink' is the definition.
(eggnog is a kind of drink)
'for one given award knocked back' is the wordplay.
'for one' becomes 'eg' (I've seen this in other clues).
'given' is a charade indicator (letters next to each other).
'award' becomes 'gong' (I've seen this before).
'knocked back' is a reversal indicator.
'gong' backwards is 'gnog'.
'eg'+'gnog'='EGGNOG'
(Other definitions for eggnog that I've seen before include "Drink which includes hot beer" , "Fortified drink similar to a flip" , "A punch for bedtime, perhaps" , "Milky winter punch" , "Christmas drink" .)