Flat tire's lack (3)
I believe the answer is:
air
(Other definitions for air that I've seen before include "Bearing, manner" , "Carriage" , "Means of travelling" , "It's a mixture mainly of oxygen and nitrogen" , "If it's hot, it's boastful" .)
I believe the answer is:
air
(Other definitions for air that I've seen before include "Bearing, manner" , "Carriage" , "Means of travelling" , "It's a mixture mainly of oxygen and nitrogen" , "If it's hot, it's boastful" .)