The phrase "an explicit note to" is correct and usable in written English.
It can be used when referring to a clear and direct message or instruction intended for someone.
Example: "Please include an explicit note to the team regarding the changes in the project timeline."
Alternatives: "a clear message to" or "a direct note to".
The criteria and incentives were detailed formally, in the regulation noted above, but without any explicit specification of the nature or the extent of the similarity required to define a "similar medicinal product".
We have restructured Figure 1D (now 2A) to include an explicit note of nucleotide/SO4- binding in each active site.
The former "Today" star reportedly gave one female colleague an explicit note and a sex toy, exposed himself to another and asked female producers blunt questions about their sex lives. .
A report from Variety, which the outlet said was the result of a two-month-long investigation into Lauer's behavior, said the "Today" host once gave a colleague an explicit note and sex toy.
An explicit note would be best – something like: "One of your charges has temporarily left the enclosure but will return shortly".
Mrs. Clinton, who refers to her bid as being "in it to win it," also sounded a more explicit note of confidence in herself as the most prepared and battle-tested contender for the Democratic nomination, even as she complimented her rivals as "great, great candidates".
According to the summary, Mr. van de Vijver first raised alarms about the reserve figures in a February 2002 memo to Sir Philip and other executives, and wrote a more explicit note for his files later that year.
Another student told the principal, Angelyn Donald, that the man and the girl had exchanged a sexually explicit note during class.
At other times, however, she has struck a more explicit note on gender.
He said that she later passed him a sexually explicit note, and invited him to her home.
