Teacher, give me something to do; I have no idea (4,3,2)

I believe the answer is:

dont ask me

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'i have no idea' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'teacher give me something to do' is the wordplay.
I cannot really see how this works, but
'teacher' could be 'don' (don can mean an academic - especially at Oxbridge) and 'don' is found in the answer.
'me' is found in the answer.
'something to do' could be 'task' (I've seen this before) and 'task' is present in the answer.
No letters remain.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Guardian.

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