Speak one's mind (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">speak one's mind</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for opine that I've seen before include "Express one's view" , "judge" , "Give one's view" , "Suggest" , "Express or hold view" .)
(Other definitions for let off steam that I've seen before include "Release pent-up feelings" , "Give vent to anger" , "Vent one's anger" , "Give vent to one's emotions" , "Release pent-up emotion" .)