Express an opinion (5)
I believe the answer is:
opine
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">express an opinion</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 opine that I've seen before include "Express or hold view" , "State one's held view" , "Hold forth" , "Express a point of view" , "Conjecture" .)