Caption found under publication (8)
I believe the answer is:
subtitle
'caption' is the definition.
(I know that caption can be written as subtitle)
'under publication' is the wordplay.
'under' becomes 'sub' (I've seen this before).
'publication' becomes 'title' (I can't explain this - if you can you should give a lot more credence to this answer).
'sub'+'title'='SUBTITLE'
'found' is the link.
Can you help me to learn more?
(Other definitions for subtitle that I've seen before include "small print?" , "Translation of foreign dialogue, displayed at the bottom of the screen" , "Explanatory legend" , "Translation of dialogue superimposed on film" , "Translate foreign dialogue at bottom of screen" .)