Returning dog, he has frill (5)
I believe the answer is:
ruche
'frill' is the definition.
(I've seen this before)
'returning dog he' is the wordplay.
'returning' says the letters should be written in reverse.
'dog' becomes 'cur' (a cur is an aggressive or scruffy dog).
'cur' reversed gives 'ruc'.
'ruc'+'he'='RUCHE'
'has' is the link.
(Other definitions for ruche that I've seen before include "fabric that's concertinaed" , "Feature of fabric" , "Pleated frilling" , "Strip of frilled lace" , "Pleated frill" .)