Time to give happy ending to listener (4)
I believe the answer is:
year
'time' is the definition.
(I know that time can be written as year)
'give happy ending to listener' is the wordplay.
'give' is a charade indicator (letters next to each other).
'ending' suggests the final letters (the ending of the word).
'to listener' becomes 'ear' (body part which hears or listens).
The last letter of 'happy' is 'y'.
'y'+'ear' is 'YEAR'.
'to' acts as a link.
(Other definitions for year that I've seen before include "Time for earth to go round sun" , "Period of just over 52 weeks" , "eg 2004" , "Student group" , "Manage" .)