They're under bonnets and boots (5)
I believe the answer is:
tires
(Other definitions for tires that I've seen before include "Grows weary of rites" , "Becomes weary and in need of rest" , "Exhausts" , "Weakens" , "Wearies" .)
I believe the answer is:
tires
(Other definitions for tires that I've seen before include "Grows weary of rites" , "Becomes weary and in need of rest" , "Exhausts" , "Weakens" , "Wearies" .)