Is it pulled to preserve neck of jumper? (7)
I believe the answer is:
ripcord
'jumper?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I don't see?
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for ripcord that I've seen before include "It's pulled to open a parachute" , "Release for parachute" .)