Crossword Genius

Wealth? Put a limit on the lot abruptly! (7)

Ross

I believe the answer is:

capital

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'wealth?' is the definition.
(thesaurus)

I cannot understand how the rest of the clue works.

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(Other definitions for capital that I've seen before include "Fantastic!" , "Money available to produce interest" , "Excellent - assets - first city" , "Funds" , "source of profit" .)

I've seen this clue in The Independent.
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