Crossword Genius

Bum stops in prison (6,4)

Ross

I believe the answer is:

behind bars

'in prison' is the definition.
(behind bars means locked away in prison)

'bum stops' is the wordplay.
'bum' becomes 'behind' (synonyms).
'stops' becomes 'bars' (bar can mean to stop or prevent).
'behind'+'bars'='BEHIND BARS'

(Other definitions for behind bars that I've seen before include "Where landlords might be" , "inside" , "Locked away" , "not being free" , "Incarcerated" .)

I've seen this clue in The Guardian.
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