Give out or give off (4)
I believe the answer is:
emit
I believe this clue is a double definition.
'give out' is the first definition.
(I know that give out can be written as emit)
'give off' is the second definition.
(I know that give off can be written as emit)
(Other definitions for emit that I've seen before include "Discharge - utter" , "Send forth" , "Let out" , "Give off, heat say" , "Exhale" .)