Nerd with new Capri pants, not a sweater? (6,6)

I believe the answer is:

prince andrew

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'not a sweater?' is the definition.
I know nothing about this answer so I can't judge whether this works.

'nerd with new capri pants' is the wordplay.
'with' is a charade indicator (letters next to each other).
'pants' is an anagram indicator (UK informal term for 'nonsense' or 'rubbish').
'new'+'capri'='newcapri'
'nerd' put after 'newcapri' is 'newcaprinerd'.
'newcaprinerd' anagrammed gives 'PRINCE ANDREW'.

Can you help me to learn more?

(Another definition for prince andrew that I've seen is " The Queen's third".)

I've seen this clue in The Guardian.

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