Follow-up (6)
I believe the answer is:
sequel
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">follow-up</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sequel that I've seen before include "Work continuing an earlier one" , "Book following another" , "Story resumption" , "Book etc. continuing story" , "Novel or film that completes story of an earlier one" .)