The most common and most likely answer to this crossword clue is the 5 plus 10 letter word VITAL STATISTICS
I've seen this crossword clue in Independent
V
I
T
A
L
S
T
A
T
I
S
T
I
C
S
More clues leading to the result VITAL STATISTICS
- Three figures specifying one?
- Proportional representation given in three figures?
- Georgia’s proportional representation?
- Six non-English stories director originally translated in, say, six measures in three parts
- Three figures describing another one
- At St Paul’s ultimate activist is unravelling government figures
- Significant numbers consumed by Page 3?
- Three measures activists list at gathering
- Mean things about death, for example?
- Important data — Ideally comes in multiples of 12
Buddy explains!
The straight part
We know that "measures in three parts" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case measures in three parts = vital statistics.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.