Crossword Genius

How photographer might appear very quickly? (2,1,5)

Ross

I believe the answer is:

in a flash

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

'very quickly?' is the definition.
(I've seen this before)

'how photographer might appear' is the wordplay.
I cannot really see how this works, but
'appear' could be 'flash' (flashing is a kind of appearing) and 'flash' is found within the answer.
The remaining letters 'ina' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for in a flash that I've seen before include "Almost instantly" , "Where American detected electricity" , "How lightning appears" , "pictures may be taken" , "Very quickly" .)

I've seen this clue in The Times.
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