Disturbance in the inner ear (7)
I believe the answer is:
vertigo
'disturbance in the inner ear' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for vertigo that I've seen before include "Feeling of dizziness generated by heights" , "Dizziness due to disorder in sense of balance" , "Hitchcock film - giddiness" , "unbalanced feeling" , "Sensation brought on by great heights" .)