The clink of a jug (6)
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 believe this clue is a double definition.
'the clink' is the first definition.
(thesaurus)
'a jug' is the second definition.
(I know that lockup is a type of jug)
'of' is the link.
(Another definition for lockup that I've seen is " Cell for prisoners".)