Answer: STREAKER

AnswerCrossword Clue
STREAKER1973-74 faddist
streakerlong, narrow mark or smear
streakerto mark with streaks
streakerto flash rapidly
streakervein; stratum
streakerone who streaks (to cover with long narrow marks)
streakerseries
STREAKERExhibitor of raw speed
STREAKERParticipant in a '70s fad
STREAKERStadium showoff
STREAKEREye-popping runner
STREAKERCampus prankster
STREAKERBuff runner?
STREAKER1970's fad participant
STREAKER70's prankster
STREAKERHe takes off and then takes off
STREAKERRunner in the raw
STREAKERPerson who can barely run
STREAKERComet, e.g.
STREAKERErstwhile campus cutup
STREAKERHis end is in sight
STREAKEROne of flashing speed.
STREAKER'70s faddist
STREAKERFast mover
STREAKERCertain prankster
STREAKERRunning buff in the buff
STREAKERNude runner
STREAKEROne barely running?
STREAKERRunner sans duds
STREAKER1974 Oscars intruder, notably