Related Clues:

• Car tire's outer layer
• __ water
• Trade somehow with tramp
• One with biased ancestors?
• Basis for getting a grip on wet-weather driving
• A measurement of tyre temperature registered
• Part of flight giving time to study
• Surface of car tyre
• Step involved in putting together Jobcentre advert
• Step between the car and the road
• Gripping part of tyre
• Energy in a sort of jazz way of dancing
• Part of sole subject ultimately studied
• Top surface of a step
• Walk with energy into square