Coheir is upset but remains courageous (6)

I believe the answer is:

heroic

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

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

'coheir is upset but remains' is the wordplay.
'coheir' can be anagrammed to 'HEROIC'.
But, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for heroic that I've seen before include "Courageous - daring" , "larger than life" , "Undaunted" , "Like a brave man" , "Of deed or person, very brave" .)

I've seen this clue in The Globe and Mail.

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