Mournful in tone (7)
I believe the answer is:
elegiac
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mournful in tone</span>' is the definition.<br/ ><span class="explanation-format__explanation">(as in an elegy)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for elegiac that I've seen before include "Expressing poetic sorrow for something past" , "Mournful as in Gray's poem" , "Wistful, mournful" , "Lie in cage being poetically mournful" , "Thoughtful" .)