Sermonise (6)
I believe the answer is:
preach
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sermonise</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 preach that I've seen before include "Moralise" , "Proclaim (religion)" , "Give a religious address" , "A perch (anag.)" , "Give, eg, a sermon" .)