The most common and most likely answer to this crossword clue is the 11 plus 4 letter word SUBSTANTIAL MEAL
I've seen this crossword clue in The Guardian
S
U
B
S
T
A
N
T
I
A
L
M
E
A
L
Buddy explains!
The straight part
We know that "a Scotch egg, some claimed" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a scotch egg, some claimed = substantial meal.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.