This is a composite character. In the centre is a pictograph of a chukar (Alectoris chukar). Then, the noun chukar is surrounded by the glyphs which mark the beginning and the end of an area. A space in which a chukar was confined would be a cage.
Illustrative Text Reference:
Mohenjo-daro: Seal: M-920 a: Sayid Ghulam Mustafa Shah and Asko Parpola, 1991: Corpus of Indus Seals and Inscriptions: Volume 2: Page 88: Collections in Pakistan: Suomalainen Tiedeakatemia.
Comment:
Chukar were used for fighting.
Image Credit:
Indus Script Sign Number 81: Sign List of the Indus Script: Iravatham Mahadevan, 1977: The Indus Script: Texts, Concordance and Tables: The Director General Archaeological Survey of India.