Very scarce (4)
I believe the answer is:
rare
'very scarce' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rare that I've seen before include "Meat that's lightly cooked" , "Seldom seen or met" , "may be bloody" , "Singular, infrequent" , "of low density" .)