Systematic study (7)
I believe the answer is:
science
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">systematic study</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 science that I've seen before include "Physics or chemistry, say" , "something learnt at school" , "Organised (search for) knowledge" , "Christian --; -- fiction" , "Organised body of knowledge" .)