Perfect ravioli and sauce ultimately a luxury starter (5)
I believe the answer is:
ideal
'perfect' is the definition.
('ideal' can be similar in meaning to 'perfect')
'ravioli and sauce ultimately a luxury starter' is the wordplay.
'ultimately' says to take the final letters.
'starter' suggests taking the first letters.
The final letters of 'ravioli and sauce' are 'ide'.
The initial letter of 'luxury' is 'l'.
'ide'+'a'+'l'='IDEAL'
(Other definitions for ideal that I've seen before include "Textbook" , "Model of perfection" , "that can't be bettered?" , "supreme" , "'Perfect, model (5)'" .)