Our sun, I discover to be capable of awful destruction (7)

I believe the answer is:

ruinous

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'be capable of awful destruction' is the definition.
I can't judge whether this definition defines the answer.

'our sun i discover' is the wordplay.
'our sun i' anagrams to 'RUINOUS'.
Though, I am not sure how the anagram is indicated.

'to' acts as a link.

Can you help me to learn more?

(Other definitions for ruinous that I've seen before include "Broken down" , "far too expensive" , "Destructive; dilapidated" , "Disastrous, destructive" , "Causing destruction" .)

I've seen this clue in the Sydney Morning Herald.

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