The most common and most likely answer to this crossword clue is the 9 letter word TELEMETRY
I've seen this crossword clue in The Guardian
T
E
L
E
M
E
T
R
Y
More clues leading to the result TELEMETRY
Buddy explains!
The straight part
We know that "Measuring" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case measuring = telemetry.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 TELEMETRY mean?
TELEMETRY noun- (applied sciences) the science, and associated technology, of the automatic recording and transmission of data from a remote source to a receiving station for analysis