Issue at the wrong time (4)
I believe the answer is:
emit
'issue' is the definition.
(both can mean to give out or radiate)
'the wrong time' is the wordplay.
'the wrong' indicates anagramming the letters.
'time' with letters rearranged gives 'EMIT'.
'at' acts as a link.
(Other definitions for emit that I've seen before include "Give off, gas say" , "Small turtle" , "Exude" , "Issue" , "Expel" .)