Crossword Genius

After moment, cry echoes: one's involved in shooting (5,4)

Ross

I believe the answer is:

flash bulb

I'm a little stuck... Click here to teach me more about this clue!

'one's involved in shooting' is the definition.
I can't tell whether this definition defines the answer.

'after moment cry echoes' is the wordplay.
'after moment' becomes 'flash' (I've seen this before. I am not sure about the 'after' bit.).
'cry' becomes 'blub' (I've seen this before).
'echoes' is a reversal indicator (I've seen 'echoing' mean this (echo can mean to reflect or bounce back)).
'blub' reversed gives 'bulb'.
'flash'+'bulb'='FLASH-BULB'

Can you help me to learn more?

(Other definitions for flash bulb that I've seen before include "Old camera attachment" , "Source of light for photo" , "Photographic light source" , "this will suddenly lighten you" , "Photographic accessory" .)

I've seen this clue in The Telegraph.
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