Use mouse to get on (5)
I believe the answer is:
click
This might be a double definition.
'use mouse' is the first 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?
'get on' is the second definition.
(if two people click they get on well)
'to' acts as a link.
Can you help me to learn more?
(Other definitions for click that I've seen before include "come down on mouse" , "a metallic sound" , "Make a hit with" , "Be compatible" , "Depress the button on a camera" .)