Fortunate spell -- brought on by this? (5,5)

I believe the answer is:

lucky charm

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'brought on by this?' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'fortunate spell' is the wordplay.
'fortunate' becomes 'lucky' (similar in meaning).
'spell' becomes 'charm' (a charm is a magic spell).
'lucky'+'charm'='LUCKY CHARM'

Can you help me to learn more?

(Other definitions for lucky charm that I've seen before include "Talisman" , "Rabbit's foot, for example" .)

I've seen this clue in The Telegraph.

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