Fines collected, last of those stuffed into trousers (6)
I believe the answer is:
levies
'fines collected' is the definition.
I can't tell whether this defines the answer.
'last of those stuffed into trousers' is the wordplay.
'last of' suggests the final letters.
'stuffed into' is an insertion indicator.
'trousers' becomes 'levis' (levis is a kind of trousers).
The last letter of 'those' is 'e'.
'e' placed within 'levis' is 'LEVIES'.
Can you help me to learn more?
(Other definitions for levies that I've seen before include "Charges" , "Taxes or fines" , "tariffs" , "Imposes a tax or fine" , "Imposes payment by authority" .)