Shoe insert (6)
(Other definitions for insole that I've seen before include "Boots may be holding it" , "support for rambler, perhaps" , "Part of a shoe or boot" , "Lesion in part of foot" , "Oxford's content" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">shoe insert</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>