Exploit, in a way
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">exploit in a way</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 milk that I've seen before include "Source of cream/butter" , "Extract money from" , "White liquid" , "Exploit" , "an early delivery?" .)