Loosely woven cotton fabric (11)
I believe the answer is:
cheesecloth
'loosely woven cotton fabric' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cheesecloth that I've seen before include "Loosely woven material" , "flimsy material" , "Cotton material" , "Loose-woven cotton fabric" , "Loosely woven cotton fabric" .)