Crossword Genius

Getting on in prison having got caught out (4)

Ross

I believe the answer is:

aged

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'getting on' is the definition.
(thesaurus)

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(Other definitions for aged that I've seen before include "Antiquated" , "Time-worn" , "Advanced in years" , "not like a callow youth" , "Getting on" .)

I've seen this clue in The Telegraph.
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