Thinly scattered ashes perhaps evenly distributed (6)
I believe the answer is:
sparse
'thinly scattered' is the definition.
(I've seen this before)
'ashes perhaps evenly distributed' is the wordplay.
'evenly' indicates alternate letters (even-numbered letters only).
'distributed' indicates anagramming the letters.
'ashes'+'perhaps'='ashesperhaps'
The alternating letters of 'ashesperhaps' are 'sepras'.
'sepras' anagrammed gives 'SPARSE'.
(Other definitions for sparse that I've seen before include "Infrequent" , "Thin on the ground, scarce" , "Far from lavish" , "One's not at all thick" , "Not much" .)