The most common and most likely answer to this crossword clue is the 11 letter word DENOMINATOR
I've seen this crossword clue in The Times
D
E
N
O
M
I
N
A
T
O
R
More clues leading to the result DENOMINATOR
Buddy explains!
The straight part
We know that "figure below this line" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case figure below this line = denominator.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 DENOMINATOR mean?
DENOMINATOR noun- The number or expression written below the line in a fraction (such as 2 in ½).
- One who gives a name to something.