Plaintive poem (5)
I believe the answer is:
elegy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">plaintive poem</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for elegy that I've seen before include "Poetic lament for the dead" , "Dirge" , "A sorrowful poem like Gray's" , "Poem lamenting the dead" , "lines of regret" .)