Talked nonsense, bored, acquiring victory (9)

I believe the answer is:

drivelled

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'talked nonsense' is the definition.
Although both the answer and definition are past participle verbs, I cannot understand how they can define each other.

'bored acquiring victory' is the wordplay.
'bored' becomes 'drilled' (I've seen this before).
'acquiring' is an insertion indicator.
'victory' becomes 'VE' (VE is short for Victory in Europe).
'drilled' placed around 've' is 'DRIVELLED'.

Can you help me to learn more?

(Another definition for drivelled that I've seen is " Talked rubbish".)

I've seen this clue in The Daily Express.

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