Physics, eg (7)
I believe the answer is:
science
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">physics eg</span>' is the definition.<br/ ><span class="explanation-format__explanation">(physics is a kind of science)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for science that I've seen before include "something learnt at school" , "a sort of fiction" , "M [MUSEUM]" , "-- Fiction; -- park" , "Biology, perhaps?" .)