Part of the neck (6)
I believe the answer is:
scruff
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">part of the neck</span>' is the definition.<br/ ><span class="explanation-format__explanation">('scruff' is part of 'neck')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for scruff that I've seen before include "Part of neck" , "bit of neck?" , "The back side of the neck" , "Back of the neck, used to lift cat" , "Untidy person - nape of neck" .)