Falls off the wagon
I believe the answer is:
relapses
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">falls off the wagon</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 relapses that I've seen before include "Deteriorates like pleasers" , "Regresses" , "becomes ill again" , "Backslides like pleasers" , "Falls back to former condition, perhaps of illness" .)