Superbly courageous maltreated coheir (6)

I believe the answer is:

heroic

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

'superbly courageous' is the definition.
'heroic' can be an answer for 'courageous' (I've seen this in another clue). I'm not sure about the 'superbly' bit.

'maltreated coheir' is the wordplay.
'maltreated' indicates an anagram.
'coheir' anagrammed gives 'HEROIC'.

Can you help me to learn more?

(Other definitions for heroic that I've seen before include "Epic" , "Of deed or person, very brave" , "larger than life" , "Extravagant" , "Supremely courageous and brave" .)

I've seen this clue in The Telegraph.

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