Deny going round women's prison (7)
I believe the answer is:
newgate
'prison' is the definition.
(I've seen this before)
'deny going round women's' is the wordplay.
'deny' becomes 'negate' (I've seen this before).
'going round' means one lot of letters goes inside another.
'women' becomes 'w'.
'negate' going around 'w' is 'NEWGATE'.
(Other definitions for newgate that I've seen before include "Old London prison" , "Old Nick" , "Stir in capital" , "Prison formerly standing on site of the Old Bailey" , "Former London prison" .)