Instalment (7)
I believe the answer is:
episode
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">instalment</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for episode that I've seen before include "Story instalment" , "Part of a broadcast serial, say" , "Set of incidents" , "Instalment of a TV series" , "Instalment; incident" .)