Crossword Genius

Somewhere for cat to sit and drink (3)

Ross

I believe the answer is:

lap

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'drink' is the definition.
(to lap is to drink up)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for lap that I've seen before include "Sports circuit" , "Once around the course" , "place for small computer?" , "Circuit of racetrack" , "Drink; lick" .)

I've seen this clue in The Times.
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