Cooked leg I had cold (5)
I believe the answer is:
gelid
'cold' is the definition.
(similar in meaning)
'cooked leg i had' is the wordplay.
'cooked' indicates an anagram (letters cooked into a new form).
'i had' becomes 'i'd' (contraction).
'leg' is an anagram of 'gel'.
'gel'+'id'='GELID'
(Other definitions for gelid that I've seen before include "Icy cold - glide (anag)" , "Glacial" , "Extremely cold, frozen" .)