The most common and most likely answer to this crossword clue is the 10 letter word THREESCORE
I've seen this crossword clue in Independent
T
H
R
E
E
S
C
O
R
E
More clues leading to the result THREESCORE
- Secret hero, roughly sixty
- Chester outing takes round about 14
- Trinity’s centre – this figure?
- Figure it’s what happens if only eight cricketers get ducks
- R 60
- So … eight make a duck — total sixty
- Sixty – implying eight ducks?
- What musicians learn about second note in number
- Article about French horn by Welshman, sixty
Buddy explains!

The straight part
We know that "this figure" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case this figure = threescore.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 THREESCORE mean?
THREESCORE noun- Sixty. (60)