Lightning report? (9)

I believe the answer is:

newsflash

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'lightning report?' is the definition.
'newsflash' can be an answer for 'report?' (newsflash is a kind of report). I am not certain of the 'lightning' bit.

'lightning report?' is the wordplay.
'lightning' becomes 'news' (I can't justify this - if you can you should believe this answer much more).
'report?' becomes 'flash' (flash is a kind of report).
'news'+'flash'='NEWSFLASH'

Can you help me to learn more?

(Other definitions for newsflash that I've seen before include "Brief report" , "Bulletin" , "Dramatic announcement" .)

I've seen this clue in The Irish Independent.

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