Yes! Once the new number is added to your account, you will be able to adjust its forwarding settings.
Select "Transfer to Extension" in the forwarding options menu. You can find that under Settings > Your Numbers and click "Edit" on the appropriate number.
Under "Forwarding Options," click the arrow to expand the menu. You can select "Transfer to Extension" and choose the extension you would like calls forwarded to. Then click "Save."
This number will not play the main greeting, and calls will be forwarded directly to the selected extension.