Ideal pan out for cooking, one covered (7)
I believe the answer is:
utopian
'ideal' is the definition.
(similar in meaning)
'pan out for cooking one covered' is the wordplay.
'for cooking' indicates anagramming the letters.
'one' becomes 'I' (Roman numeral).
'covered' means one lot of letters goes inside another.
'pan'+'out'='panout'
'panout' anagrammed gives 'utopan'.
'utopan' going around 'i' is 'UTOPIAN'.
(Other definitions for utopian that I've seen before include "Unworkable" , "Fancifully ideal" , "More work was literally so" , "Impractically idealistic" , "Just perfect as in Thomas More's fictional country" .)