Scanty in amount (6)
I believe the answer is:
meagre
'scanty in amount' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for meagre that I've seen before include "Thin on the ground, scarce" , "Insufficient (portion)" , "Thin or scanty" , "Lacking in quantity or quality" , "lacking in strength" .)