Smart chain mayor finally removed (5)
I believe the answer is:
sting
'smart' is the definition.
(both can mean to burn or hurt)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for sting that I've seen before include "Hurt; smart" , "aka Gordon Sumner" , "Undercover operation; wound" , "Carefully planned trap - scorpion's weapon" , "piece of deception" .)