Destroy enthusiasm with trade-ins he scrapped (10)

I believe the answer is:

dishearten

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'destroy enthusiasm' is the definition.
I can't tell whether this definition defines the answer.

'trade-ins he scrapped' is the wordplay.
'scrapped' is an anagram indicator.
'trade'+'ins'+'he'='tradeinshe'
'tradeinshe' is an anagram of 'DISHEARTEN'.

'with' is the link.

Can you help me to learn more?

(Other definitions for dishearten that I've seen before include "Bring down" , "Take away bottle" , "Take hope from" , "dismay?" , "Cause (someone) to lose confidence" .)

I've seen this clue in The Irish Times.

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