Grocery bag option (5)
I believe the answer is:
paper
'grocery bag option' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for paper that I've seen before include "Treatise" , "Eg, The Times" , "Threat that seems powerful (but is just a pussy cat!)" , "Set of examination questions" , "Daily publication" .)