Send out publication (5)
I believe the answer is:
issue
I believe this is a double definition.
'send out' is the first definition.
(I've seen this before)
'publication' is the second definition.
(issue is a kind of publication)
(Other definitions for issue that I've seen before include "outlet" , "something to discuss" , "Give out; children" , "Result - children" , "Matter of debate" .)