The most common and most likely answer to this crossword clue is the 8 letter word BIBLICAL
I've seen this crossword clue in The Times
B
I
B
L
I
C
A
L
More clues leading to the result BIBLICAL
Buddy explains!
The straight part
We know that "Great" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case great = biblical.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 BIBLICAL mean?
BIBLICAL adjective- Of or relating to the Bible.
- In accordance with the teachings of the Bible (according to some interpretation of it).
- Very great; especially, exceeding previous records in scale.