Boat son consigns to scrapheap (5)

I believe the answer is:

junks

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'consigns to scrapheap' is the definition.
I can't tell whether this defines the answer.

'boat son' is the wordplay.
'boat' becomes 'junk' (type of Asian ship).
'son' becomes 's'.
'junk'+'s'='JUNKS'

Can you help me to learn more?

(Another definition for junks that I've seen is " Chinese boats".)

I've seen this clue in The Telegraph.

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