One of the accent colours used for battle (7)

I believe the answer is:

magenta

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'for battle' is the definition.
(Magenta is an example)

I cannot understand how the remainder of the clue works.

(Other definitions for magenta that I've seen before include "Light mauvish-crimson" , "Name tag (anag) - colour" , "Colour named after a bloody 1859 battle in Italy" , "Bright purplish red or magnate" , "French victory" .)

I've seen this clue in The Irish News.

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