Crossword Genius

Completely shut off, there's nothing exceptional about me? (10)

Ross

I believe the answer is:

impassable

'completely shut off' is the definition.
(that which cannot be passed or travelled over)

I can't explain the remainder of the clue.

(Other definitions for impassable that I've seen before include "won't be crossed" , "Blocked to travel" , "preventing progress" .)

I've seen this clue in The Times.
Want a hint initially instead of a full solution? Install my app