Crossword Genius

Stuck up in two ways? (5)

Ross

I believe the answer is:

proud

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'stuck up' is the definition.
(thesaurus)

I don't understand how the rest of the clue works.

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(Other definitions for proud that I've seen before include "Self-satisfied - stately - protruding" , "Haughty - sticking out" , "Feeling self-respect - projecting from a surface" , "Guilty of deadly sin" , "Walking tall" .)

I've seen this clue in The Sun.
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