Set aside for future use (7)
I believe the answer is:
earmark
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">set aside for future use</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 earmark that I've seen before include "Set aside for special purpose" , "Reserve for later use" , "Set aside for a specific purpose" , "Set aside for later" , "Set aside specifically" .)