Scanty, inadequate (6)
I believe the answer is:
meagre
I believe this is a double definition.
'scanty' is the first definition.
(similar in meaning)
'inadequate' is the second definition.
(I've seen this before)
(Other definitions for meagre that I've seen before include "Polite form of address" , "skinny" , "Thin -- inadequate" , "Lacking in quantity or quality" , "Inadequate, scanty" .)