S a herb, they say - it should be scattered thinly (8)
I believe the answer is:
sparsely
'thinly' is the definition.
(I've seen this in another clue)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for sparsely that I've seen before include "sporadic distribution" , "in meagre quantities" , "Scarcely" , "Thinly (scattered)" , "Meagerly, scantily" .)