Crossword Genius

Volume perhaps a couple of pints over (6)

Ross

I believe the answer is:

quarto

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'volume' is the definition.
The answer and definition can be both human attributes as well as being singular nouns.
Maybe there's a link between them I don't understand?

'a couple of pints over' is the wordplay.
'a couple of pints' becomes 'quart' (I've seen this before).
'over' becomes 'o' (cricket abbreviation).
'quart'+'o'='QUARTO'

'perhaps' acts as a link.

Can you help me to learn more?

(Other definitions for quarto that I've seen before include "Publishing term, four leaves are formed from one sheet" , "Book size resulting in folding one sheet four times" , "Twice-folded paper size" , "Ten-by-eight inch paper" , "Book page size" .)

I've seen this clue in The Times.
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