A paper sent out to be published (6)
I believe the answer is:
'be published' is the definition.
(I've seen this before)
'a paper sent out' is the wordplay.
'sent' indicates anagramming the letters (send can mean to excite or stimulate).
'out' indicates putting letters inside.
'paper' is an anagram of 'apper'.
'a' placed within 'apper' is 'APPEAR'.
'to' is the link.
(Other definitions for appear that I've seen before include "Become visible or seem", "Look - materialise", "Seem - come into view", "Show up, become visible", "become available".)