Crossword Genius

Teacher carries round maths work? (5)

Ross

I believe the answer is:

proof

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'maths work?' is the definition.
'proof' can be an answer for 'work?' (proof is a kind of work). I am not certain of the 'maths' bit.

'teacher carries round' is the wordplay.
'teacher' becomes 'prof' (I've seen this before).
'carries' indicates putting letters inside (inserted letters carried inside).
'round' becomes 'o' (round can mean a round object).
'prof' placed around 'o' is 'PROOF'.

Can you help me to learn more?

(Other definitions for proof that I've seen before include "Trial printing" , "to give a watertight case?" , "Demonstration of the truth of something" , "Test" , "Factual evidence" .)

I've seen this clue in The Telegraph.
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