Police comeback after record is nothing irregular (8)
I believe the answer is:
episodic
'irregular' is the definition.
(thesaurus)
'police comeback after record is nothing' is the wordplay.
'police' becomes 'cid' (**).
'comeback' says the letters should be written backwards.
'after' says to put letters next to each other.
'record' becomes 'ep'.
'nothing' becomes 'o' (looks like zero - 0).
'cid' written backwards gives 'dic'.
'ep'+'is'+'o'='episo'
'dic' after 'episo' is 'EPISODIC'.
(Other definitions for episodic that I've seen before include "Occurring irregularly - is copied accordingly" , "Sporadic" , "Occurring irregularly or in instalments" , "in serial form" , "Presented in sections" .)