I have already mentioned this as an answer to another thread somewhere, but I don't know if anyone saw it as I got no response, so I will try putting as its own question instead.
On Clamp's move set page (link is here) is says that Clamp has an accuracy of 75%. It also says under the 'Changes' section that it used to have 75% accuracy in Gen I - IV. After looking around in Bulbapedia, I found that Clamp's accuracy was changed in Gen V to be 85%.
