Crossword Genius

A sitter, maybe, but not all that easy (5)

Ross

I believe the answer is:

poser

I'm a little stuck... Click here to teach me more about this clue!

'a sitter maybe' is the definition.
(I know that art model is a type of poser)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for poser that I've seen before include "Spore raises a difficult question" , "Attitudiniser" , "A puzzle made of ropes" , "Hard question" , "This person's affected" .)

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