City is the best, it's said (5)
I believe the answer is:
Here is my best explanation:
'city' is the definition.
(Leeds is an example)
'is the best it's said' is the wordplay.
'is the best' becomes 'leads'.
'it's said' indicates a 'sounds like' (homophone) clue.
'leads' is a homophone of 'LEEDS'.
(Other definitions for leeds that I've seen before include "Yorks city", "In city", "Industrial city of northern England", "West Yorkshire city", "Soccer team", "Team", "Yorkshire city - Kent castle", "British city and premier division football club", "English football team" and "City near Bradford".)