Suffix with south (3)
I believe the answer is:
ern
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">suffix with south</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 ern that I've seen before include "Eric Morecambe's partner" , "Little Ernest" .)