Zip up coats the salesman came back with (7)

I believe the answer is:

scamper

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'back with' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe there's an association between them I don't understand?

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for scamper that I've seen before include "Skip about briskly" , "Skip playfully with campers" , "Run with quick light steps" , "Beetle" , "Run around" .)

I've seen this clue in the Evening Standard.

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