Go off to stop one old judge (11)

I believe the answer is:

deteriorate

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'go off' is the definition.
'deteriorate' can be an answer for 'go' (thesaurus). I am not certain of the 'off' bit.

'stop one old judge' is the wordplay.
'stop' becomes 'deter' (I've seen this in another clue).
'one' becomes 'i' (Roman numeral).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'judge' becomes 'rate' (rating is a kind of judging).
'deter'+'i'+'o'+'rate'='DETERIORATE'

'to' is the link.

Can you help me to learn more?

(Other definitions for deteriorate that I've seen before include "Go downhill" , "Gradually worsen" , "Become slowly worse" , "Slip" , "Grow worse" .)

I've seen this clue in The Daily Mail.

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