Change too much (8)
I believe the answer is:
overload
'change too much' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'too much' is the wordplay.
I cannot really see how this works, but
'too much' could be 'over' (I've seen this in other clues) and 'over' is found within the answer.
The remaining letters 'load' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for overload that I've seen before include "tax" , "Demand too much of" , "Excessive electrical demand" , "Weigh down" , "Put too great a demand on (a system)" .)