Assert, declare (5)
I believe the answer is:
state
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">assert</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">declare</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that state is a type of advise)</span><br/ ><br/ ></span>
(Other definitions for state that I've seen before include "Express; pomp" , "Claim" , "Public" , "Declare - political unit" , "Condition of country." .)