Prate (6)
I believe the answer is:
tattle
'prate' is the definition.
(I know that prate can be written as tattle)
This is the entire clue.
(Other definitions for tattle that I've seen before include "Tell tales" , "Gossip, idle chatter" , "Chatter idly" , "Divulge secrets" , "Inform on someone" .)