Agree to do without (8)
I believe the answer is:
forswear
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">agree to do without</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 forswear that I've seen before include "Reject or disavow" , "Denounce" , "Give up" , "Retract - recant" , "Deny on oath" .)