Dauntless display might be moreish (7)

I believe the answer is:

heroism

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'dauntless display' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'might be moreish' is the wordplay.
'might be' indicates anagramming the letters (I've seen this in other clues).
'moreish' with letters rearranged gives 'HEROISM'.

Can you help me to learn more?

(Other definitions for heroism that I've seen before include "Act of unselfish bravery" , "Courageous quality" , "brave action" , "Oh miser! (anag.)" , "Gallantry" .)

I've seen this clue in The Sun.

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