Unsociable type experiences a bit of vertigo after the prologue (9)

I believe the answer is:

introvert

I'm a little stuck... Click here to teach me more about this clue!

'unsociable type experiences a bit' is the definition.
I can't tell whether this defines the answer.

'vertigo after the prologue' is the wordplay.
'vertigo' becomes 'vert' (I can't explain this - if you can you should give a lot more credence to this answer).
'after' is a charade indicator (letters next to each other).
'the prologue' becomes 'intro' (introduction).
'vert' put after 'intro' is 'INTROVERT'.

'of' is the link.

Can you help me to learn more?

(Other definitions for introvert that I've seen before include "Shy and reticent person" , "Turn inwards" , "Self-absorbed person" , "Shy type" , "Rover tint (anag.)" .)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.