Paid attention to (6)
I believe the answer is:
heeded
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">paid attention to</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 heeded that I've seen before include "Paid attention to, say warning" , "Took notice of" , "Took note" , "Listened, minded" , "Respected" .)