Tries to deice, as winter roads (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
salts
(Other definitions for salts that I've seen before include "Epsom--; smelling --" , "Six [EPSOM]'s might revive" , "Old sailors" , "medication" , "Medicinal compounds; Epsom --" .)