Dog set about heavy meal (6)
I believe the answer is:
stodge
'heavy meal' is the definition.
(I've seen this before)
'dog set about' is the wordplay.
'about' indicates anagramming the letters.
'dog'+'set'='dogset'
'dogset' with letters rearranged gives 'STODGE'.
(Other definitions for stodge that I've seen before include "Heavy filling food" , "Sticky stuff" , "Dull work" , "Food that's hard to digest" , "Heavy solid food" .)