If you read over the stat block with a keen eye, you might notice that the dire wolf’s main weapon is its powerful biting jaw. However, other four-legged animals have claw attacks as well. If you want to make dire wolves as well as any other wolves more dangerous, you could add a claw attack to them as well. In order to keep the extra attack balanced, however, you should probably make it weaker than the bite attack and also have it be conditional. In the real world, wolves will bite and drag their prey down and will typically use their claws for traction and running. They will also use their claws to hold prey in place rather than try to fight with them. So maybe have the wolf try to knock its foe prone with a bite attack, then they can grapple with their claws. If the prey tries to get up, they need to make a check to escape the grapple and wrestle the wolf’s claws off of them. That would be closer to the real world, but if you want to play less of a real world game and more of a fantasy one, then you can give the wolf very weak claw attacks that it could use.