Thin cotton fabric (6)
(Other definitions for muslin that I've seen before include "Lightweight cotton cloth" , "dress material" , "Light cotton cloth" , "Lightweight cotton fabric" , "Fine soft plain-woven cotton fabric of gauzy appearance" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">thin cotton fabric</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cheesecloth that I've seen before include "flimsy material" , "Loose-woven cotton fabric" , "Loosely woven material" , "Loosely woven cotton fabric" , "Light woven fabric for protecting food or making shirts" .)
(Other definitions for seersucker that I've seen before include "Cotton" , "Puckered fabric" , "Material" .)