Scrawny, weedy (6)
I believe the answer is:
skinny
This clue is a double definition.
'scrawny' is the first definition.
(I know that scrawny can be written as skinny)
'weedy' is the second definition.
(I know that weedy can be written as skinny)
(Other definitions for skinny that I've seen before include "Underfed" , "Scrawny, underweight" , "Not very well-built" , "Very slim" , "'Scrawny, weedy (6)'" .)