Stereotyped, outwardly, as a charger (5)

I believe the answer is:

steed

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'charger' is the definition.
(I've seen this in another clue)

I don't understand how the remainder of the clue works.

(Other definitions for steed that I've seen before include "Stallion" , "Powerful horse" , "Spirited horse" , "Literary term for horse" , "(Poetic) horse" .)

I've seen this clue in the Evening Standard.

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