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' can be anagrammed to 'EMIT'.
However, I'm unsure how the anagram 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!" .)