The most common and most likely answer to this crossword clue is the 10 letter word DINNERTIME
I've seen this crossword clue in Financial Times
D
I
N
N
E
R
T
I
M
E
More clues leading to the result DINNERTIME
Buddy explains!

The straight part
We know that "occasion to scoff" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case occasion to scoff = dinnertime.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 DINNERTIME mean?
DINNERTIME noun- The time when dinner takes place.
- The time when dinner is ready.
- The midday break in English schools (some areas), lunchtime.