Computer retaining much after reprogramming (6,7)

I believe the answer is:

turing machine

'computer' is the definition.
(I've seen this before)

'retaining much after reprogramming' is the wordplay.
'after reprogramming' indicates anagramming the letters.
'retaining'+'much'='retainingmuch'
'retainingmuch' is an anagram of 'TURING MACHINE'.

(Another definition for turing machine that I've seen is " computer".)

I've seen this clue in The Times.

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