Indian prince knocking back a glass of beer and a hock (8)
I believe the answer is:
maharaja
'indian prince' is the definition.
(I've seen this before)
'knocking back a glass of beer and a hock' is the wordplay.
'knocking back' is a reversal indicator.
'glass of beer' becomes 'jar' (I've seen this before).
'and' says to put letters next to each other.
'hock' becomes 'ham' (I've seen this in other clues).
'a'+'jar'+'a'+'ham'='ajaraham'
'ajaraham' back-to-front is 'MAHARAJA'.
(Other definitions for maharaja that I've seen before include "Indian prince or king" , "foreign ruler" , "Indian ruler" , "Hindu prince" , "Eminent Indian" .)