Crossword Genius

Mathematical indicator of negative balance perhaps (5,4)

Ross

I believe the answer is:

minus sign

This clue is a double definition.

'mathematical indicator' is the first definition.
(symbol for subtraction)

'negative balance perhaps' is the second definition.
(I know that subtraction symbol is a type of minus sign)

'of' acts as a link.

(Other definitions for minus sign that I've seen before include "Symbol indicating subtraction" , "Maths operator" , "indication of negativity?" , "indicating deduction!" , "Subtraction indicator" .)

I've seen this clue in The Independent.
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