Slight, slim (7)
I believe the answer is:
slender
This clue is a double definition.
'slight' is the first definition.
(I know that slight can be written as slender)
'slim' is the second definition.
(I know that slim can be written as slender)
(Other definitions for slender that I've seen before include "Spare" , "Fine" , "with a narrow outlook" , "Gracefully thin and elegant" , "Sylphlike" .)