One hand is flat (8)

I believe the answer is:

straight

This clue is a double definition.

'one hand' is the first definition.
(poker)

'flat' is the second definition.
(synonyms)

'is' is the link.

(Other definitions for straight that I've seen before include "Respectable" , "Not curved or bent" , "Good poker hand" , "Uncurved" , "proper place" .)

I've seen this clue in The Sunday Times and The Times.

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