Earthing (9)
I believe the answer is:
grounding
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">earthing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for grounding that I've seen before include "keeping home" , "Punishment by parent" , "Basic training" , "Rudimentary knowledge" , "Foundation of basic knowledge" .)