Manual cover (5)
I believe the answer is:
glove
'manual cover' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
This is all the clue.
Can you help me to learn more?
(Other definitions for glove that I've seen before include "one on hand?" , "hands warmer" , "Noisy disturbance" , "Hand in this is very closely associated" , "Covering for hand" .)