Meagre, inadequate (6)
I believe the answer is:
scanty
This clue is a double definition.
'meagre' is the first definition.
(similar in meaning)
'inadequate' is the second definition.
(I've seen this in another clue)
(Other definitions for scanty that I've seen before include "Inadequate" , "Of small amount, barely enough" , "Of small extent; barely sufficient" , "Spare" , "brief" .)