Rolling stone's lack
I believe the answer is:
moss
'rolling stone's lack' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for moss that I've seen before include "evidence of neglect?" , "Plant growing on many lawns" , "Green-carpet plant" , "Plant(s) not wanted on lawns" , "Type of plant growing in damp places" .)