Crossword Genius

No husband for more upper-class model (5)

Ross

I believe the answer is:

poser

'model' is the definition.
(I know that model can be written as poser)

I cannot understand how the remainder of the clue works.

(Other definitions for poser that I've seen before include "This person's affected" , "Exhibitionist" , "Tricky clue" , "One pretends to be something they are not" , "Puzzling question for the model" .)

I've seen this clue in The Guardian.
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