Overindulgence (6)
I believe the answer is:
excess
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">overindulgence</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for excess that I've seen before include "Outrageous behaviour; extra payment" , "more than enough" , "Glut; surplus" , "Over and above what's needed" , "Overabundance" .)