Answer:

slipstream

AnswerCrossword Clue
SLIPSTREAMAir current caused by a propeller
SLIPSTREAMAir current caused by a racecar
SLIPSTREAMPropeller-created wind
SLIPSTREAMPropeller backwash
SLIPSTREAMBackwash of an aircraft
SLIPSTREAMDrive right behind another racecar
SLIPSTREAMPropeller wash
SLIPSTREAMRacecar-generated air current