Derive by logic
I believe the answer is:
infer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">derive by logic</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for infer that I've seen before include "Establish by deduction" , "Presume" , "Take finer meaning from" , "Conclude or judge from facts" , "Take or gather meaning from" .)