Crossword Genius

In popular idiom, uninteresting (4)

Ross

I believe the answer is:

arid

'uninteresting' is the definition.
(I've seen this in another clue)

'in popular idiom' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ARID' is hidden in the letters of 'popular idiom'.

(Other definitions for arid that I've seen before include "Wadi may be this" , "Sterile" , "flat" , "Dry raid" , "Rainless (region)" .)

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