Good-as-new tires (8)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">good-as-new tires</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 retreads that I've seen before include "recovered tyres" , "Serrated like tyres restored for use" , "Arrested over resurfaced tyres" , "They gain fresh employment" , "Serrated like remoulded tyres" .)