King George and father grab a quiet drink (6)
I believe the answer is:
grappa
'drink' is the definition.
(grappa is a kind of drink)
'king george and father grab a quiet' is the wordplay.
'king george' becomes 'gr' (Georgius Rex).
'and' is a charade indicator (letters next to each other).
'father' becomes 'pa' (pa is a kind of father).
'grab' indicates putting letters inside.
'a quiet' becomes 'ap' (I've seen this in other clues).
'gr'+'pa'='grpa'
'grpa' going around 'ap' is 'GRAPPA'.
(Other definitions for grappa that I've seen before include "Type of brandy" , "Italian brandy distilled from grape lees" , "Spirit distilled from fermented grape remains" , "Italian drink" , "Brandy made from wine press residue" .)