The Indus Dictionary Project
This is an ideograph of someone flapping their arms. It is the verb to agitate or stir.
Mohenjo-daro: Silver Seal: M-315 a: Jagat Pati Joshi and Asko Parpola, 1987: Corpus of Indus Seals and Inscriptions: Volume 1: Page 78: Collections in India: Suomalainen Tiedeakatemia.
There is only one extant example of this Indus sign. The inscription on M-315 refers to the preparation of tea.
Indus Script Sign Number 1395: List of Sign Variants: Iravatham Mahadevan, 1977: The Indus Script: Texts, Concordance and Tables: The Director General Archaeological Survey of India.