Speak pompously (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">speak pompously</span>' is the definition.<br/ ><span class="explanation-format__explanation">(to orate is to give a speech)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for orate that I've seen before include "Make a formal address" , "Make a formal speech" , "Speak formally" , "make speeches" , "talk at length" .)
(Another definition for bloviate that I've seen is " Speak arrogantly to Americans".)