Retook test about rates (5)

I believe the answer is:

resat

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'retook test' is the definition.
Although both the answer and 'retook' are verbs, they are not in the same form of the verb.

'about rates' is the wordplay.
'about' is an anagram indicator.
'rates' with letters rearranged gives 'RESAT'.

Can you help me to learn more?

(Other definitions for resat that I've seen before include "Took (exam) again" , "did test again" , "was tested again" , "went back to the paper" , "Took another chance to pass" .)

I've seen this clue in The Mirror.

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