Narrow escape with new system preventing shock (4,5)
I believe the answer is:
near thing
'narrow escape' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for near thing that I've seen before include "Knife-edge event" , "Almost a nasty incident" , "Even the short-sighted could plainly see that" , "Something that barely avoids failure or disaster" , "dangerous" .)