That kissable Katharina (4)

I believe the answer is:

kate

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'katharina' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for kate that I've seen before include "Cole Porter musical 'Kiss Me ....'" , "'Kiss me ___' (show)" , "Katherine (dim.)" , "'Kiss me, ---' (Shrew)" .)

I've seen this clue in the Evening Standard.

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