See red drop of alcohol's still taken quickly (8)
I believe the answer is:
snapshot
'still taken quickly' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for snapshot that I've seen before include "Picture" , "Instant record of an event" , "pic" , "print" , "image" .)