Hi Anad,
I hope I got it correctly because the configs are not very verbose (no descriptions there so I mostly guessed) and there is no CX in the toplogy file (So I guess it is network connected to LSW5).
Well, I think that you have several options.
One option is, for example, configuring static routes all the way from LSW5 to AX. But since you have that configured on LSW4 these would be the remaining steps:
LSW5 - add static route to 192.168.1.0/24 (ip route 192.168.1.0 255.255.255.0 10.61.1.1)
AX - add static route to 10.61.1.0/24 (ip route 10.61.1.0 255.255.255.0 10.21.1.2)
AX - redistribute static route to 192.168.1.0/24 into ISIS (redistribute static under router isis 1)
DX - add interface vlan 23 into ISIS routing (ip router isis 1 under interface vlan 23)
Best regards,
Jan
