The most common and most likely answer to this crossword clue is the 8 letter word STORMONT
I've seen this crossword clue in The Guardian
S
T
O
R
M
O
N
T
More clues leading to the result STORMONT
- Rage not, strangely, in NI Parliament
- Disturbance about Turkish leader in European parliament
- Politicians here — most are reportedly not Labour
- Row not unexpected in Belfast’s parliament
- Rage about temperature in seat of power
- Continue to rant, beginning to traduce Irish parliament
- Parliament‘s rage over introduction of tax
Buddy explains!

The straight part
We know that "European parliament" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case european parliament = stormont.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.