Top US lawyer indicted in battle (9)

I believe the answer is:

agincourt

I'm a little stuck... Click here to teach me more about this clue!

'battle' is the definition.
(Agincourt is an example)

'top us lawyer indicted in' is the wordplay.
I cannot quite see how this works, but
'in' is within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for agincourt that I've seen before include "October twenty four, 1415 battle" , "Fourteen fifteen English victory" , "where Henry met Constable" , "French village" , "1415 battle in the Pas-de-Calais" .)

I've seen this clue in The Daily Express.

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