Go on too long (7)

I think it could be either:

Which length description are you looking for?:

overrun

'go on too long' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for overrun that I've seen before include "Exceed (allowed time/cost)" , "Move too fast" , "Cover - attack" , "Infest - defeat totally" , "(Programme) take too long; defeat easily" .)

I've seen this clue in The Guardian, The Independent, the New York Times, The Telegraph, The Sun and The Times.

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