Crossword Genius

Dodgy Russian showing a bit of brain (5)

Ross

I believe the answer is:

gyrus

'a bit of brain' is the definition.
(type of ridge on the brain)

'dodgy russian showing' is the wordplay.
'showing' indicates a hidden word.
'GYRUS' is hidden in the letters of 'dodgy russian'.

(Another definition for gyrus that I've seen is " something on the brain".)

I've seen this clue in The Guardian.
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