Crossword Genius

Single advance of funds, we hear (4)

Ross

I believe the answer is:

lone

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'single' is the definition.
(synonyms)

I can't explain the remainder of the clue.

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(Other definitions for lone that I've seen before include "Solitary, sounds like advance" , "Single and isolated" , "Companionless" , "Solitary, without companions" , "The ... Ranger, fictional masked cowboy" .)

I've seen this clue in The Times.
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