Crossword Genius

Difficult question for a model (5)

Ross

I believe the answer is:

poser

I believe this clue is a double definition.

'difficult question' is the first definition.
(I've seen this before)

'for a model' is the second definition.
('poser' can be a synonym of 'model')

(Other definitions for poser that I've seen before include "Hard question" , "Particularly baffling problem" , "Conundrum - model?" , "One pretends to be something they are not" , "Problem set by the model" .)

I've seen this clue in The Mirror and The Daily Express.
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