The most common and most likely answer to this crossword clue is the 4 letter word BAPS
I've seen this crossword clue in The Guardian
B
A
P
S
More clues leading to the result BAPS
- Group flying, by the way, in Rolls
- Rolls heading for Barmouth, a resort on the up
- Rolls on front by applying pressure steadily
- Metal supplement present in rolls
- Rolls spaghetti bolognese out — note the eggs/oil blending before separation
- Snack bar’s offering primarily beans and pork sausages
- a Rolls seen coming back from Vespa building
Buddy explains!

The straight part
We know that "Snack bar’s offering" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case snack bar’s offering = baps.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 BAPS mean?
BAPS noun- A soft bread roll, originally from Scotland.
- (chiefly in the plural) A woman's breast.