Get mixed up and overload the circuit (4)
I believe the answer is:
fuse
This could be a double definition.
'get mixed up' is the first definition.
Although both the answer and definition are verbs in their base form, I cannot see how they can define each other.
'overload the circuit' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'and' is the link.
Can you help me to learn more?
(Other definitions for fuse that I've seen before include "Meld" , "Melt with heat" , "'Blend, merge (4)'" , "Weld together through heat" , "Unite by melting" .)