Band will repair the damage (9)

I believe the answer is:

megadeath

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'band will' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'repair the damage' is the wordplay.
'repair' indicates an anagram.
'the'+'damage'='thedamage'
'thedamage' is an anagram of 'MEGADEATH'.

Can you help me to learn more?

(Other definitions for megadeath that I've seen before include "end of civilisation" , "Huge human tragedy" .)

I've seen this clue in The Hindu.

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