Cause of wear and tear (3)
I believe the answer is:
use
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cause of wear and tear</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 use that I've seen before include "Employment; utilise" , "Habitually employ" , "Custom - service" , "Avail oneself of" , "Benefit" .)