jeffl seconded. We had it on an 09 Civic, I knew about the weakness before buying but the salesman just claimed it only affected the CRV (because he was a dck) We knew he was lying but all cars have weak points so we bought it anyway.
Anyway, he sodded off on holiday when it did happen a year later, the upside was we got a new clutch and flywheel for just 2 hours labour after some negotiation with Honda’s main office. It was on 80,000 and a couple of years out of warranty, but it had FSH and was sold to us by a dealer so they gave us some ‘goodwill’.
So, you need to test drive it again. Get it warmed up and then give it the beans in 5th and 6th, be a bit rough with the clutch to try and provoke any slippage. If it starts to slip, force yourself to keep your foot down and if its a weak pressure plate (and not just a worn clutch) it will suddenly stop slipping and accelerate normally. Explain to the seller why you are checking as its likely its already been replaced and fixed with a later clutch.
If its petrol, ignore all I said, I’m not sure if the clutch is different or the engine doesn’t have enough torque, but it doesn’t seem to be an issue.