Deep emotions (12)
I believe the answer is:
heartstrings
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">deep emotions</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 heartstrings that I've seen before include "affection" , "Deep affections" , "Love" , "deep emotions" .)