Fresh scandal, might you say, in old lock-up (7)
I believe the answer is:
newgate
'you say in old lock-up' is the definition.
I can't judge whether this defines the answer.
'fresh scandal' is the wordplay.
'fresh' becomes 'new' (synonyms).
'scandal' becomes 'gate' (as in Watergate and other formations).
'new'+'gate'='NEWGATE'
'might' acts as a link.
Can you help me to learn more?
(Other definitions for newgate that I've seen before include "Old Nick" , "Prison formerly standing on site of the Old Bailey" , "prison long ago" , "Stir in capital" , "London street" .)