Criminal penalised and imprisoned (8)
I believe the answer is:
confined
'imprisoned' is the definition.
(synonyms)
'criminal penalised' is the wordplay.
'criminal' becomes 'con' (abbreviation for 'convict').
'penalised' becomes 'fined' (synonyms).
'con'+'fined'='CONFINED'
'and' acts as a link.
(Other definitions for confined that I've seen before include "Restricted" , "put inside" , "not let out?" , "deprived of freedom" , "Not free to move about" .)