Configure wireless interface wlan1 on AP:

[admin@AP]>
interface wireless set wlan1 ssid=mikrotik frequency=5805
... mode=bridge wds-mode=dynamic disabled=no

Do the same configuration on Client wireless interface (wlan1):

[admin@Client]>
interface wireless set wlan1 ssid=mikrotik frequency=5805
... mode=bridge wds-mode=dynamic disabled=no

Check whether the WDS link is established:

[admin@AP] interface wireless wds> print
Flags: X - disabled, R - running, D - dynamic
 0  RD name="wds1" mtu=1500 mac-address=00:0B:6B:31:02:4B arp=enabled
       disable-running-check=yes master-interface=wlan1
       wds-address=00:0B:6B:31:08:22
[admin@AP] interface wireless wds>

Create a bridge interface on AP, and add wlan1 and ether1 interfaces to the bridge. The WDS interface will be added automatically to the bridge if you specify wds-default-bridge parameter:

[admin@AP]>
        interface bridge add name=wds-bridge
[admin@AP]>
        interface bridge port set wlan1,ether1 bridge=wds-bridge
[admin@AP]>
        interface wireless set wlan1 wds-default-bridge=wds-bridge

Do the same on Client:

[admin@Client]>
         interface bridge add name=wds-bridge
[admin@Client]>
         interface bridge port set wlan1,ether1 bridge=wds-bridge
[admin@Client]>
         interface wireless set wlan1 wds-default-bridge=wds-bridge

Add IP address on AP:

[admin@AP]> ip address add address=10.1.0.1/24 interface=wds-bridge

And on Client:

[admin@Client]> ip address add address=10.1.0.2/24 interface=wds-bridge

Test the link:

[admin@AP]> ping 10.1.0.2
10.1.0.2 64 byte ping: ttl=64 time=1 ms
10.1.0.2 64 byte ping: ttl=64 time=1 ms
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 1/1.0/1 ms
[admin@AP]>