The most common and most likely answer to this crossword clue is the 8 letter word CARRYALL
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The straight part
We know that "large bag" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case large bag = carryall.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does CARRYALL mean?
CARRYALL noun- A large bag; a holdall
- A light, covered carriage drawn by a single horse
- Any of several types of automobile, usually a station wagon or van built on a truck chassis.