Offender not primarily close to centre of power (5)
I believe the answer is:
inner
'close to centre of power' is the definition.
I can't tell whether this definition defines the answer.
'offender not primarily' is the wordplay.
'offender' becomes 'sinner' (sinner is a kind of offender).
'not primarily' means to remove the first letter.
'sinner' with its first letter taken off is 'INNER'.
Can you help me to learn more?
(Other definitions for inner that I've seen before include "Situated inside" , "may not satisfy this man" , "closer than magpie" , "Ring round the target bull." , "Very private room" .)