Complicated word or phrase (8)
I believe the answer is:
mouthful
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">complicated word or phrase</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 mouthful that I've seen before include "Outburst of strong language" , "Complicated word or phrase" , "Difficult word or phrase to pronounce" , "Something difficult to say or understand" .)