Vital blow to digital depression? (9)
I believe the answer is:
keystroke
'digital depression?' is the definition.
The definition suggests a singular noun which matches the answer.
'vital blow' is the wordplay.
'vital' becomes 'key' (key can mean important).
'blow' becomes 'stroke' (I've seen this before).
'key'+'stroke'='KEYSTROKE'
'to' is the link.
Can you help me to learn more?
(Other definitions for keystroke that I've seen before include "It serves to type one letter" , "One character typed" , "Single operation on a typewriter" , "Action that's pressing" , "Single motion during typing" .)