Announcer’s honest sound (6)
I believe the answer is:
strait
'sound' is the definition.
(I know that sound can be written as strait)
'announcer's honest' is the wordplay.
'announcer's' indicates a 'sounds like' (homophone) clue (how it might sound if announced out loud).
'honest' becomes 'straight' (associated in meaning).
'straight' is a homophone of 'STRAIT'.
(Other definitions for strait that I've seen before include "Connecting passage of water" , "Narrow stretch of sea" , "-- -laced (prudish)" , "Narrow watery stretch" , "Hardship - narrow passage of water" .)