Crossword Genius

Drink making you sanctimonious? (4,4)

Ross

I believe the answer is:

half pint

I'm a little stuck... Click here to teach me more about this clue!

'drink making you sanctimonious?' is the definition.
I can't judge whether this defines the answer.

'drink making you' is the wordplay.
'drink' becomes 'half' (I've seen this before).
'making you' becomes 'pint' (I can't explain this - if you can you should give a lot more credence to this answer).
'half'+'pint'='HALF-PINT'

Can you help me to learn more?

(Other definitions for half pint that I've seen before include "pair of gills?" , "could be bitter" , "Creature with short legs" , "Some Guinness" , "Small person" .)

I've seen this clue in The Times.
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