One demanding freedom from retribution, dismissing naughty child (5)
I believe the answer is:
unity
'one' is the definition.
(synonyms)
'freedom from retribution dismissing naughty child' is the wordplay.
'freedom from retribution' becomes 'impunity' (freedom from punishment).
'dismissing' suggests deleting specific letters.
'naughty child' becomes 'imp' (informal term for a misbehaving child).
'impunity' with 'imp' removed is 'UNITY'.
'demanding' acts as a link.
(Other definitions for unity that I've seen before include "Mitford girl" , "State of complete and harmonious whole" , "Completeness (with nothing wanting)" , "One of the Mitfords" , "Number one" .)