It's bound to be a bit of a shock (5)
I believe the answer is:
sheaf
'shock' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for sheaf that I've seen before include "Bundle of cereal plants" , "Stack, bundle" , "Bundle, as of reeds for thatching" , "Bundle of wheat" , "Collection of papers" .)