Went through the notes too quickly (9)
I believe the answer is:
overspent
'went' is the definition.
Although both the answer and definition are past participle verbs, I can't understand how one could define the other.
'through the notes too quickly' is the wordplay.
I cannot quite understand how this works, but
'through' could be 'over' (I've seen this in other clues) and 'over' is present in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for overspent that I've seen before include "Used too much money" , "Invested too much" , "Beyond budget" , "financial crisis" , "Bought too much" .)