Crufts regularly allowed meat on the bone (6)
I believe the answer is:
cutlet
'meat on the bone' is the definition.
(piece of meat)
'crufts regularly allowed' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'allowed' becomes 'let' (to let is to allow or permit).
The alternate letters of 'crufts' are 'cut'.
'cut'+'let'='CUTLET'
(Other definitions for cutlet that I've seen before include "Lamb or veal chop from behind the neck" , "Eg, a lamb chop" , "William -, Piers Plowman author" , "Small piece of meat from neck or ribs" , "Small piece of meat with bone attached" .)