A little flash (6)

I believe the answer is:

minute

I believe this is a double definition.

'a little' is the first definition.
(thesaurus)

'flash' is the second definition.
(thesaurus)

(Other definitions for minute that I've seen before include "Precise" , "microscopic" , "Brief jotting" , "Tiny like time unit (6)" , "Short period of time" .)

I've seen this clue in the Evening Standard.

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