Girl turning up with something worth having (5)

I believe the answer is:

asset

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'something worth having' is the definition.
(an asset is something valuable or useful)

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

Can you help me to learn more?

(Other definitions for asset that I've seen before include "Valuable person" , "A thing of value" , "Something valuable to have" , "Item of property" , "- - -stripper" .)

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