After selling out, what shopkeeper's doing about legwear (10)

I believe the answer is:

restocking

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'after selling out what shopkeeper's doing' is the definition.
I can't judge whether this defines the answer.

'about legwear' is the wordplay.
'about' becomes 're' (regarding).
'legwear' becomes 'stocking' (I can't justify this - if you can you should believe this answer much more).
're'+'stocking'='RESTOCKING'

Can you help me to learn more?

(Another definition for restocking that I've seen is " Replenishing".)

I've seen this clue in The Times.

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