Crossword Genius

Sound of keys rattling in prison (5)

Ross

I believe the answer is:

clink

I believe this is a double definition.

'sound of keys rattling' is the first definition.
(metallic sound)

'prison' is the second definition.
(the clink can informally mean prison)

'in' acts as a link.

(Other definitions for clink that I've seen before include "Ringing sound - prison" , "Sound made when hitting glass" , "Old London prison" , "1 ac [COOLER]" , "jug" .)

I've seen this clue in The Guardian.
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