If a bowler gets a century, there's talk (4)
I believe the answer is:
chat
'talk' is the definition.
(I know this)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for chat that I've seen before include "Talk easily; songbird" , "An inconsequential and informal talk" , "Talk casually" , "Casual conversation" , "Talk amiably - bird" .)