Try and listen (4)
I believe the answer is:
hear
I believe this clue is a double definition.
'try' is the first definition.
(as in to try someone in court or hear their case)
'listen' is the second definition.
(I know that listen can be written as hear)
'and' acts as a link.
(Other definitions for hear that I've seen before include "receive information" , "Hark" , "to judge" , "Perceive by the auditory sense" , "Listen to" .)