Washer women at home stopping behind after setback (4-3)

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">washer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(something used to wash)</span><br/ ><br/ >'<span class="explanation-format__original">women at home stopping behind after setback</span>' is the wordplay.<br/ >'<span class="explanation-format__original">women</span>' becomes '<span class="explanation-format__intermediate">w</span>' <span class="explanation-format__explanation">(standard abbreviation)</span>.<br/ >'<span class="explanation-format__original">at home</span>' becomes '<span class="explanation-format__intermediate">in</span>' <span class="explanation-format__explanation">('I'm in' can mean 'I'm at home')</span>.<br/ >'<span class="explanation-format__original">stopping</span>' is an insertion indicator <span class="explanation-format__explanation">(stopping can mean blocking a gap)</span>.<br/ >'<span class="explanation-format__original">behind</span>' becomes '<span class="explanation-format__intermediate">butt</span>' <span class="explanation-format__explanation">(both can mean the buttocks)</span>.<br/ >'<span class="explanation-format__original">after setback</span>' says the letters should be written backwards.<br/ >'<span class="explanation-format__intermediate">butt</span>' written backwards gives '<span class="explanation-format__intermediate">ttub</span>'.<br/ >'<span class="explanation-format__intermediate">w</span>'+'<span class="explanation-format__intermediate">in</span>'='<span class="explanation-format__intermediate">win</span>'<br/ >'<span class="explanation-format__intermediate">win</span>' inserted into '<span class="explanation-format__intermediate">ttub</span>' is '<span class="explanation-format__answer">TWIN-TUB</span>'.<br/ ></span>