The Romans' champion (4)

I believe the answer is:

hero

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

'champion' is the definition.
(I know that champion can be written as hero)

'the romans'' is the wordplay.
'HERO' is hidden in amongst the letters.
But, I am not sure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for hero that I've seen before include "Principal male figure in a story" , "chap we revere" , "Man of valour" , "Exceptionally courageous person" , "girl a ring" .)

I've seen this clue in The Mirror.

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