Policeman arresting husband, extremely prickly and rough (6)
I believe the answer is:
choppy
'rough' is the definition.
(thesaurus)
'policeman arresting husband extremely prickly' is the wordplay.
'policeman' becomes 'cop' (I've seen this before).
'arresting' is an insertion indicator.
'husband' becomes 'h'.
'extremely' suggests removing the centre.
'prickly' with its centre taken out is 'py'.
'cop' placed around 'h' is 'chop'.
'chop'+'py'='CHOPPY'
'and' acts as a link.
(Other definitions for choppy that I've seen before include "(Of sea) with many small waves" , "a little rough" , "Not still" , "Describes a rough sea with small waves" , "(Of seas) rough" .)