Rib-eye request (4)
I believe the answer is:
rare
'rib-eye request' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rare that I've seen before include "Very scarce, like undercooked steak" , "Excellent; uncommon" , "Very scarce and probably valuable" , "little done?" , "Seldom encountered" .)