Thinly distributed (6)
'thinly distributed' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for sparse that I've seen before include "Thinly dotted about" , "rarely occurring" , "Thinly-spread" , "Thinly spread" , "not packed together" .)
'thinly distributed' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rare that I've seen before include "Unusual - exquisite" , "Very scarce, hardly cooked" , "Unusual(ly fine)" , "Singular, infrequent" , "Seldom seen or met" .)