Dark — somewhere to sleep in Paris (5)

I believe the answer is:

unlit

'dark' is the definition.
(similar in meaning)

I don't understand the remainder of the clue.

(Other definitions for unlit that I've seen before include "Shady" , "Shadowy" , "not switched on" , "Lacking illumination" , "not exactly bright" .)

I've seen this clue in The Times.

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