Highly scattered (6)
I believe the answer is:
sparse
'highly scattered' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sparse that I've seen before include "Thinly dispersed" , "Meagre, scanty" , "Scarce like thinning hair" , "Thin on the ground, scarce" , "Infrequent" .)