This is a pictograph of a man on skis, holding two ski poles. Hence, it is the noun skier.
Illustrative Text Reference:
Kalibangan: Seal: K-60 a: Jagat Pati Joshi and Asko Parpola, 1987: Corpus of Indus Seals and Inscriptions: Volume 1: Page 310: Collections in India: Suomalainen Tiedeakatemia.
Comment:
It is possible that this Indus sign represents a group of people who were known for their skiing skills.