Crossword Genius

Tidy flat (8)

Ross

I believe the answer is:

straight

I believe this clue is a double definition.

'tidy' is the first definition.
(thesaurus)

'flat' is the second definition.
(synonyms)

(Other definitions for straight that I've seen before include "Honest, not crooked" , "Unswerving" , "square" , "Candid" , "not gay" .)

I've seen this clue in The Globe and Mail.
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