This is a tough spot because we want to protect that player, and by inspecting his hand and saying "nope he doesn't have a 10" it could affect how he can play his hand. For instance, should the flop come 10-10-5 or something like it now he can't represent the 10.
Now in this instance (with two aces) I'm sure he won't be worried about representing a 10, but we don't want to have to make that determination.
I have told dealers that if they suspect a card might have been exposed on the deal, take the cautionary measure and switch it with a burn card so that we protect that player from someone knowing his hole card. In this case where the dealer didn't see it, I'm ok with inspecting the hand and it could very well be the best option, as other options aren't great either.
I'm starting to lean towards just saying "player in seat 5 believes he may have seen the 10 of clubs in this player's hand" and letting the card stand, since the dealer didn't think the card flashed and no one else spoke up. IDK, tough spot gotta think about it more.