Evidence of parking on top storey (5)

I believe the answer is:

proof

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

'evidence of parking on top storey' is the definition.
'proof' can be an answer for 'evidence' (evidence proves something). I am not sure about the 'of parking on top storey' bit.

'evidence of' is the wordplay.
'evidence' becomes 'pro' (pro is a kind of evidence).
'pro'+'of'='PROOF'

Can you help me to learn more?

(Other definitions for proof that I've seen before include "Specimen" , "paper for correcting" , "Render impervious (to)" , "Demonstration of the truth of something" , "Convincing evidence" .)

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.