Chief of Police thrown out of club, say (5)
I believe the answer is:
utter
'say' is the definition.
(to utter something is to speak or say it)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for utter that I've seen before include "Put into words" , "Articulate, express" , "Without a single qualification" , "Perfect" , "Total < state" .)