Child, a daughter of my brother, that is chucked out in pre-battle steps (3,5)

I believe the answer is:

war dance

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But I can't explain it at all! Could you help me understand?

(Other definitions for war dance that I've seen before include "Steps taken by fighters" , "moves anticipating conflict?" , "Pre-battle ceremony" , "steps taken before engagement" , "Tribal ceremony before battle" .)

I've seen this clue in The Hindu.

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