Study, with "over" (4)
I believe the answer is:
pore
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">study with over</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 pore that I've seen before include "Rope around tiny hole" , "Small skin orifice; study" , "Sweat-gland opening" , "Minute opening in the skin" , "Sweat gland" .)