Turn in, push out and knock about (6)
I believe the answer is:
punish
'knock about' is the definition.
(thesaurus)
'turn in push out' is the wordplay.
'turn' is a reversal indicator.
'out' is an insertion indicator.
'in' written backwards gives 'ni'.
'ni' going into 'push' is 'PUNISH'.
'and' acts as a link.
(Other definitions for punish that I've seen before include "Fine perhaps" , "Impose penalty for crime or misbehaviour" , "Mete out penalty to" , "Possibly fine" , "Chastise" .)