Knickers etc the scoundrel waved about (12)

I believe the answer is:

underclothes

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'knickers etc' is the definition.
I can't tell whether this definition defines the answer.

'the scoundrel waved about' is the wordplay.
'waved about' indicates anagramming the letters.
'the'+'scoundrel'='thescoundrel'
'thescoundrel' anagrammed gives 'UNDERCLOTHES'.

Can you help me to learn more?

(Other definitions for underclothes that I've seen before include "Garments worn next to the skin" , "junior counsel, at first unwilling to accept points" , "Items worn next to the skin" , "Vests etc" .)

I've seen this clue in The Telegraph.

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