The most common and most likely answer to this crossword clue is the 9 letter word TAOISEACH
I've seen this crossword clue in Financial Times
T
A
O
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S
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A
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H
More clues leading to the result TAOISEACH
- The right way is for everyone to be premier
- Old Chinese philosophy briefly followed by every European leader
- Oireachtas not right to upset leader of republic
- Truth and openness initially is displayed by every Irish prime minister
- Chinese way of thinking is superior to every single European PM
- Head of government‘s French bird almost mangê par mauvais chat
- Philosophical system is needed by every single PM
- Varadkar’s calories regularly consumed in train
- Chinese way is taken by every single Irish leader
- Irish chief has philosophical principal one gets to see through, not right
Buddy explains!

The straight part
We know that "Varadkar" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case varadkar = taoiseach.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.
Crossword Answer definitions
TAOISEACH noun- The head of the Irish government, comparable to a British or Australian Prime Minister.