Disease of grasses (5)
I believe the answer is:
ergot
(Other definitions for ergot that I've seen before include "drug supplier" , "Parasitical fungus" , "It's horny" , "One across disease of rye" , "problem with grass" .)
I believe the answer is:
ergot
(Other definitions for ergot that I've seen before include "drug supplier" , "Parasitical fungus" , "It's horny" , "One across disease of rye" , "problem with grass" .)