Crossword Genius

Hart's sympathy about queen showing affluence (10)

Ross

I believe the answer is:

prosperity

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

'affluence' is the definition.
(thesaurus)

'hart's sympathy about queen' is the wordplay.
I cannot quite understand how this works, but
'queen' could be 'er' (abbreviation for Elizabeth Regina) and 'er' is found within the answer.
'sympathy' could be 'pity' (pity is a kind of sympathy) and 'pity' is located in the remaining letters.
The remaining letters 'pros' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

'showing' acts as a link.

Can you help me to learn more?

(Other definitions for prosperity that I've seen before include "wealth" , "Financial success" , "Things going well" .)

I've seen this clue in the Sydney Morning Herald.
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