The most common and most likely answer to this crossword clue is the 8 letter word STATISTS
I've seen this crossword clue in Financial Times
S
T
A
T
I
S
T
S
Buddy explains!

The straight part
We know that "politicians" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case politicians = statists.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 STATISTS mean?
STATISTS noun- A skilled politician or one with political power, knowledge or influence.
- A statistician.
- A supporter of statism.