Crossword Genius

In retirement, realise half a mil possessed advantages? (5)

Ross

I believe the answer is:

edges

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'advantages?' is the definition.
(edge is a kind of advantage)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for edges that I've seen before include "Borders, rims" , "Outside limits" , "Outer limits" , "They're used for cutting" , "Boundaries of a surface" .)

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