Opposite of abundant (6)
I believe the answer is:
scarce
'opposite of abundant' is the definition.
('scarce' is the opposite to 'abundant')
This is the entire clue.
(Other definitions for scarce that I've seen before include "Falling short of demand" , "Hard to get" , "Not plentiful, in short supply" , "Rare shock Conservative getting in" , "Insufficient to meet demand" .)