Key to clothes shop (5)

I believe the answer is:

tesco

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'shop' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's a link between them I don't understand?

'key to clothes' is the wordplay.
'key' becomes 'esc' ('Escape' key on a computer keyboard).
'clothes' means one lot of letters goes inside another (some letters clothe or cover others).
'esc' inserted into 'to' is 'TESCO'.

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I've seen this clue in The Independent.

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