A godsend that is somehow causing upset? (7,3,4)

I believe the answer is:

against the odds

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'upset?' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'a godsend that is somehow' is the wordplay.
'somehow' indicates anagramming the letters.
'godsend'+'that'+'is'='godsendthatis'
'godsendthatis' with letters rearranged gives 'gainsttheodds'.
'a'+'gainsttheodds'='AGAINST THE ODDS'

'causing' is the link.

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I've seen this clue in The Sunday Times and The Times.

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