Crossword Genius

Somewhere to sleep in Matlock? (8)

Ross

I believe the answer is:

mattress

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'matlock?' is the definition.
Both the answer and definition are singular nouns.
Maybe you can see a link between them that I can't see?

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for mattress that I've seen before include "For the smart set to lie on?" , "Sleeping support" , "Stuffed bag on which to sleep" , "Large thick pad on the bed" , "Padded bag on which to sleep" .)

I've seen this clue in The Guardian.
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