Timely end for city (3)
I believe the answer is:
ely
'timely end for city' is the definition.
'ely' can be an answer for 'city' (I've seen this before). I am not sure about the 'timely end for' bit.
'timely end for city' is the wordplay.
'end' says to take the final letters.
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'city' becomes 'el' (I can't explain this - if you can you should give a lot more credence to this answer).
The last letter of 'timely' is 'y'.
'y' after 'el' is 'ELY'.
Can you help me to learn more?
(Other definitions for ely that I've seen before include "Diocese in Eastern England" , "'Isle' in Cambridgeshire" , "See" , "Cambs. city" , "Fenland city" .)