The most common and most likely answer to this crossword clue is the 6 letter word METRES
I've seen this crossword clue in Financial Times
M
E
T
R
E
S
More clues leading to the result METRES
Buddy explains!

The straight part
We know that "certain measures" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case certain measures = metres.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 METRES mean?
METRES verb- To measure with a metering device.
- To imprint a postage mark with a postage meter.
- To regulate the flow of or to deliver in regulated amounts (usually of fluids but sometimes of other things such as anticipation or breath).
- The basic unit of length in the International System of Units (SI: Système International d'Unités), equal to the distance travelled by light in a vacuum in 1/299 792 458 seconds. The metre is equal to 39 47/127 (approximately 39.37) imperial inches.
- The rhythm or measure in verse and musical composition.
- To put into metrical form.