Form of poem (7)
I believe the answer is:
rondeau
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">form of poem</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 rondeau that I've seen before include "Type of poem" , "Short lyrical poem" , "Short poem with only two rhymes and opening words used twice as refrain" , "... and another" , "Sort of poem" .)