They're timely at Westminster (6)
I believe the answer is:
chimes
I'm afraid I can't even guess how this answer relates to the clue.
Can you help me to learn more?
(Other definitions for chimes that I've seen before include "Set of tuned bells struck with a hammer" , "Bell sounds, as fitted to front door" , "Ringing sounds" , "Sounds made by bells" , "Rings" .)