Issue in item after item (4)
I believe the answer is:
emit
'issue' is the definition.
(both can mean to give out or radiate)
'item after item' is the wordplay.
'item' anagrams to 'EMIT'.
However, I am not sure how this is indicated.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for emit that I've seen before include "Make audible sounds" , "'Give out, light say (4)'" , "Release" , "Exhale" , "Come out!" .)