Crossword Genius

The side of a sock (5)

Ross

I believe the answer is:

right

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'the side' is the definition.

I can't explain the rest of the clue.

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(Other definitions for right that I've seen before include "OK?" , "Fitting; entitlement" , "Correct; appropriate" , "Properly" , "Legal entitlement" .)

I've seen this clue in the Evening Standard.
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