Listened to the cattle, say (5)
I believe the answer is:
heard
'listened to' is the definition.
(I've seen this in another clue)
'the cattle say' is the wordplay.
'the cattle' becomes 'herd' (I've seen this in other clues).
'say' shows a homophone (sound like).
'herd' sounds like 'HEARD'.
(Other definitions for heard that I've seen before include "Perceived by the ear" , "Caught - picked up" , "Detected aurally" , "Tried" , "Picked up by the ears?" .)