Not charged for the pad (4)
I believe the answer is:
flat
'for the pad' is the definition.
(type of home or 'pad')
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for flat that I've seen before include "Even - somewhere to live" , "Apartment; even" , "not deep?" , "Not sloping; apartment" , "Personal residence" .)