Without moving, grabbing a bit of chocolate in a flash (9)

I believe the answer is:

scintilla

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'flash' is the definition.
(I've seen this before)

'without moving grabbing a bit of chocolate in a' is the wordplay.
'without moving' becomes 'still' (I am not sure about this - if you are sure you should believe this answer much more).
'grabbing' indicates putting letters inside.
'a bit of' suggests taking the first letters.
The initial letter of 'chocolate' is 'c'.
'c'+'in'='cin'
'still' enclosing 'cin' is 'scintill'.
'scintill'+'a'='SCINTILLA'

Can you help me to learn more?

(Other definitions for scintilla that I've seen before include "Slight amount" , "suspicion" , "Minute spark" , "Tiny trace or amount" , "little bit" .)

I've seen this clue in The Times.

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