"And so …" (4)
I believe the answer is:
ergo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">and so</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ergo that I've seen before include "Thus" , "Hence" , "for this reason" , "Therefore - what a goer" , "as a consequence" .)