Internal organ (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">internal organ</span>' is the definition.<br/ ><span class="explanation-format__explanation">(heart is a kind of internal organ)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for heart that I've seen before include "the name of a prison in Midlothian!" , "Red card" , "See 22" , "bottle" , "Body organ" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">internal organ</span>' is the definition.<br/ ><span class="explanation-format__explanation">(stomach is a kind of internal organ)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for stomach that I've seen before include "Saclike organ" , "Abdomen" , "Belly - tolerate!" , "Endure; organ" , "Tummy" .)
(Other definitions for spleen that I've seen before include "Acrimony" , "Bodily organ associated with bad humour" , "Organ of the body and short temper" , "Ill-humour" , "Organ supposedly controlling temper" .)