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Students attending here in auditorium hoovered up? (5)

Ross

I believe the answer is:

eaten

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'up?' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?

'students attending here in auditorium hoovered' is the wordplay.
I cannot quite understand how this works, but
'attending' could be 'at' (e.g. at school means attending school) and 'at' is found in the answer.
The remaining letters 'een' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for eaten that I've seen before include "Upset" , "This bread is soon forgotten, it's said" , "having taken courses?" , "absorbed in the system" , "Polished off" .)

I've seen this clue in The Telegraph.
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