Large bag (4)
'large bag' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for sack that I've seen before include "It carries coal" , "Dismiss (from a job)" , "Fire - old Spanish wine" , "Flour or grain bag" , "Dismiss; plunder; wine" .)
'large bag' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for holdall that I've seen before include "Largish bag" , "Large carrying bag" , "Capacious bag or basket" , "retainer" , "Large strong bag with handles or shoulder strap" .)