In the ZD you can go under configuration, AP and overwrite the ZD settings for the AP. However, be careful not to change the PoE port or uplink where the AP connect to your network.
Assign the VLAN you want to the port on the AP you want to connect the client and make it an access VLAN. Make sure that the switch port where the AP is connected to is setup as trunk with the native VLAN being the management VLAN of your AP and under allowed, ensure you pass both, the native/management VLAN and the VLAN you setup for your client on whichever port you picked.
That should do it.