Corvette quartet (5)
I believe the answer is:
tires
'corvette quartet' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tires that I've seen before include "Becomes weary and in need of rest" , "Wearies" , "Grows weary of rites" , "Weakens" , "Exhausts" .)