Trump is making a comeback with something seedy? (8)

I believe the answer is:

capsicum

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'something seedy?' is the definition.
I can't tell whether this defines the answer.

'trump is making a comeback with' is the wordplay.
'trump' becomes 'cap' (both can mean to beat or override).
'making a comeback' says the letters should be written backwards.
'with' becomes 'cum' ('with' in Latin).
'is' backwards is 'si'.
'cap'+'si'+'cum'='CAPSICUM'

Can you help me to learn more?

(Other definitions for capsicum that I've seen before include "something pungent" , "Fruit crop" , "American pepper" , "Chili pepper genus" , "hot stuff perhaps" .)

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