Courage to overcome shattering grief (10)

I believe the answer is:

heartbreak

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'grief' is the definition.
(I know that grief can be written as heartbreak)

'courage to overcome shattering' is the wordplay.
'courage' becomes 'heart' (heart is a kind of courage).
'to overcome shattering' becomes 'break' (I can't justify this - if you can you should give a lot more credence to this answer).
'heart'+'break'='HEARTBREAK'

Can you help me to learn more?

(Other definitions for heartbreak that I've seen before include "Grief" , "sad state" , "Overwhelming distress" , "Anguish" , "Intense disappointment" .)

I've seen this clue in The Guardian.

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