Get down in a flash (6)
I believe the answer is:
alight
'get down in a flash' is the definition.
'alight' can be an answer for 'get' (thesaurus). I am not certain of the 'down in a flash' bit.
'get down in a' is the wordplay.
I cannot quite see how this works, but
'a' is present in the answer.
'get down' could be 'light' (synonyms) and 'light' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for alight that I've seen before include "in flames" , "Leave a vehicle - burning" , "Settle; on fire" , "Disembark, land" , "Land; on fire" .)