Central points (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">central points</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 foci that I've seen before include "fixed points" , "targets" , "Points for attention" , "Central points (of the greatest activity)" , "Centres" .)
(Other definitions for loci that I've seen before include "Particular positions" , "Particular places" , "locations" , "sites" , "Points where something occurs; coil (anag.)" .)