Crossword Genius

Dull to allow little accommodation (7)

Ross

I believe the answer is:

flatlet

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'little accommodation' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'dull to allow' is the wordplay.
'dull' becomes 'flat' (similar in meaning).
'to allow' becomes 'let' ('let' can be a synonym of 'allow').
'flat'+'let'='FLATLET'

Can you help me to learn more?

(Other definitions for flatlet that I've seen before include "A tiny apartment" , "Tiny living quarters" .)

I've seen this clue in The Daily Express.
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