Obeyed (6)
(Another definition for conformed that I've seen is " toed the party line".)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">obeyed</span>' is the definition.<br/ ><span class="explanation-format__explanation">(heeding is a kind of obeying)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for heeded that I've seen before include "Took notice of" , "Took note" , "Paid attention to, say warning" , "Listened, minded" , "Respected" .)