Publicity item, for short (5)
I believe the answer is:
promo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">publicity item for short</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for promo that I've seen before include "publicity event" , "for [a] little while" , "Publicity for project or product (abbr)" , "Brief publicity" , "Ad" .)