Prison reformer’s quick meal (4-3)

I believe the answer is:

stir-fry

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'quick meal' is the definition.
'stir fry' can be an answer for 'meal' (I have seen 'Chinese meal ' mean 'stir fry' so perhaps 'meal' could also mean 'stir fry'). I am not certain of the 'quick' bit.

'prison reformer's' is the wordplay.
'prison' becomes 'stir' (informal term for prison).
'reformer' becomes 'Fry' (Elizabeth Fry).
'stir'+'fry'='STIR-FRY'

Can you help me to learn more?

(Another definition for stir-fry that I've seen is " Dish cooked in wok or frying pan".)

I've seen this clue in The Times.

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