Carefully consider (5)
(Other definitions for weigh that I've seen before include "Quantify mass" , "Find the heaviness of" , "Assess" , "Gauge" , "Put in the balance?" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">carefully consider</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ponder that I've seen before include "Think deeply about, ruminate" , "Give thought to" , "Think weightily about" , "Carefully consider" , "Ruminate, mull over" .)