Dull meat recipe (4)
I believe the answer is:
tame
'dull' is the definition.
(both can mean boring)
'meat recipe' is the wordplay.
'recipe' indicates an anagram.
'meat' anagrammed gives 'TAME'.
(Other definitions for tame that I've seen before include "Flat" , "'Domesticated, docile (4)'" , "Not wild, unexciting" , "Not exciting; domesticate" , "quiet" .)