Crossword Genius

Runs out of wreck. Everything is lost with inexperienced money-spinner (4,3)

Ross

I believe the answer is:

cash cow

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'money-spinner' is the definition.
(synonyms)

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

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(Other definitions for cash cow that I've seen before include "Lucrative investment" , "Lucrative activity" , "Lucrative endeavour" , "Steady income provider" , "Money-maker" .)

I've seen this clue in The Hindu.
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