Exquisite (4)
I believe the answer is:
rare
'exquisite' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for rare that I've seen before include "Very scarce, like undercooked steak" , "Occurring infrequently" , "Very infrequent or scarce" , "Special" , "Rear up, being scarce" .)