The most common and most likely answer to this crossword clue is the 11 letter word SCRATCHINGS
I've seen this crossword clue in The Daily Telegraph
S
C
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A
T
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More clues leading to the result SCRATCHINGS
Buddy explains!
The straight part
We know that "Pub snack" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pub snack = scratchings.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 SCRATCHINGS mean?
SCRATCHINGS noun- The act or sound of something being scratched.
- A pork scratching.
- Record scratching, a technique of starting and stopping a vinyl record from playing to produce music in hip hop.