I cooked with Grace Dent's scale (10)
I believe the answer is:
centigrade
'scale' is the definition.
(I've seen this before)
'i cooked with grace dent's' is the wordplay.
'cooked with' indicates an anagram (letters cooked into a new form).
'grace'+'dent'='gracedent'
'i' anagrammed with 'gracedent' can make 'CENTIGRADE'.
(Other definitions for centigrade that I've seen before include "C" , "scale" , "measure of warmth" .)