Crossword Genius

Teasing the fellow about it continuing so boringly (8,2)

Ross

I believe the answer is:

dragging on

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'continuing so boringly' is the definition.
I can't judge whether this defines the answer.

'teasing the fellow about it' is the wordplay.
'teasing' becomes 'ragging' ('rag' can be a synonym of 'tease').
'the fellow' becomes 'don' (both can mean an academic).
'about it' is an insertion indicator.
'ragging' placed inside 'don' is 'DRAGGING ON'.

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I've seen this clue in the Evening Standard.
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