They reduce the shock from jumps (7)
I believe the answer is:
springs
'jumps' is the definition.
(I know this)
'they reduce the shock from' is the wordplay.
I cannot really understand how this works, but
'from' could be 'in' (I've seen this in other clues) and 'in' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for springs that I've seen before include "what might be after Alice?" , "Jumps; metal coils" , "Natural flows of ground water" , "Elastic metal coils" .)