Let borrow (4)
I believe the answer is:
lend
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">let borrow</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 lend that I've seen before include "Advance, loan" , "Offer" , "Impart" , "Give (a quality) to" , "Give the use of for a time" .)