Does he know how to put up goods for sale? (10)

I believe the answer is:

shoplifter

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'does he know how to put up goods for sale?' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

This is the entire clue.

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(Other definitions for shoplifter that I've seen before include "Robber" , "Thieving customer" , "guilty party" , "Thief" , "Criminal (in a retail context)" .)

I've seen this clue in The Irish News.

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