The clink of a jug (6)

I think it could be either:

prison

lockup

I believe this is a double definition.

'the clink' is the first definition.
(thesaurus)

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

'of' acts as a link.

(Other definitions for prison that I've seen before include "Gaol" , "Nick" , "punishment" , "Eg, Wormwood Scrubs" , "Stir - can" .)

I've seen this clue in the Evening Standard.

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