Primarily shunning hijabs, Iranian ladies overthrow hierarchy in historic battle (6)

I believe the answer is:

shiloh

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'historic battle' is the definition.
'shiloh' can be an answer for 'battle' (Shiloh is an example). I am not certain of the 'historic' bit.

'primarily shunning hijabs iranian ladies overthrow hierarchy' is the wordplay.
'primarily' says to take the initial letters.
The first letters of 'shunning hijabs iranian ladies overthrow hierarchy' is 'SHILOH'.

'in' acts as a link.

Can you help me to learn more?

(Another definition for shiloh that I've seen is " battle".)

I've seen this clue in The Independent.

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