Paste-up (7)
I believe the answer is:
collage
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">paste-up</span>' is the definition.<br/ ><span class="explanation-format__explanation">(collage is a kind of paste-up)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for collage that I've seen before include "Stuck-on art form" , "Artwork formed from scraps of paper, photos etc" , "Paste-up" , "Art form using pieces stuck on" , "Pictures made by sticking together pieces of paper etc." .)