Tyre pattern (5)
I believe the answer is:
tread
(Other definitions for tread that I've seen before include "Tramp" , "Stomp heavily" , "Part of flight" , "Top surface of a stair step" , "pace" .)
I believe the answer is:
tread
(Other definitions for tread that I've seen before include "Tramp" , "Stomp heavily" , "Part of flight" , "Top surface of a stair step" , "pace" .)