Dare envoy to be prepared for roasting (4-5)
I believe the answer is:
oven-ready
'prepared for roasting' is the definition.
'dare envoy to be' is the wordplay.
'to be' indicates anagramming the letters.
'dare'+'envoy'='dareenvoy'
'dareenvoy' is an anagram of 'OVEN-READY'.
(Other definitions for oven-ready that I've seen before include "Already prepared for cooking (of chickens)" , "Pre-cooked" .)