Crossword Genius

Critical wife, seeing wee in your cups? (7)

Ross

I believe the answer is:

waspish

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'critical' is the definition.
Both the definition and answer are adjectives. Maybe you can see an association between them that I don't see?

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for waspish that I've seen before include "Pshaw, is like a stinging insect" , "irascible" , "Easily-provoked" , "Sharp and irritable like stinging insect" , "stingy?" .)

I've seen this clue in The Independent.
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