Marketing device (3-2)
I believe the answer is:
tie-in
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">marketing device</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tie-in that I've seen before include "Something linked to another item or event" , "Book, etc, linked to film, TV show" , "Relationship" , "Make a link (with)" , "Item linked with popular film, programme etc" .)