Take too far (6)
I believe the answer is:
overdo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">take too far</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for overdo that I've seen before include "Be excessive, perhaps in cooking food" , "Be excessive, say cook too long" , "Maybe burn" , "Cook too long or act excessively" , "Exaggerate; use too much of" .)