The most common and most likely answer to this crossword clue is the 7 letter word VERTIGO
I've seen this crossword clue in The Guardian
V
E
R
T
I
G
O
More clues leading to the result VERTIGO
- Doctor I try controls onset of rare medical condition
- Initially en route today to block Spanish port, causing complaint
- Extremely hacked off by top of tower, I split — having this
- Tiger released in very old film thriller
- Order to rig vote to create sense of instability
- Green Goblin initially breaks into Number 10 — Spider-man’s unaffected by this
- Turning over channel to catch series — set off for film
- Rig vote designed to cause feeling of instability
- It makes people unfit for high positions
- Primarily, reason I’ve got dizzy?
Buddy explains!

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 VERTIGO mean?
VERTIGO noun- A sensation of whirling and loss of balance, caused by looking down from a great height or by disease affecting the inner ear.
- A disordered or imbalanced state of mind or things analogous to physical vertigo; mental giddiness or dizziness.
- The act of whirling round and round; rapid rotation.