Stolen items in goods wagon (4)

I believe the answer is:

swag

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'stolen items' is the definition.
Although both the answer and 'items' are nouns, they are not in the same form of the noun.

'in goods wagon' is the wordplay.
'in' indicates the answer is hidden within the clue.
'SWAG' can be found hidden inside 'goods wagon'.

Can you help me to learn more?

(Other definitions for swag that I've seen before include "Burglar's haul" , "Part of a curtain" , "Burglar's booty" , "Booty, loot" , "hot property" .)

I've seen this clue in The Times.

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