With two pints in belly, boozers see one indicating 'Time!' (6,5)

'one indicating time' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'with two pints in belly boozers see' is the wordplay.
I cannot really understand how this works, but
'see' could be 'clock' (clock can mean to see or notice) and 'clock' is present in the answer.
'two pints' could be 'quart' (unit of liquid equal to two pints) and 'quart' is present in the answer.
A single letter 'z' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?