Ok, replaced the .MOD file to my own working dir.
And included the following:
.INCLUDE C:\Users\...\LTSPICE lib\LM13700.MOD
Now LTSpice is telling me there's a port mismatch between "lm13700" and "xu1".
The asy has 9 ports (1 to 8 + 11), the .MOD file also describes 9 ports:
.SUBCKT LM13700 1 2 3 4 5 6 7 8 11
Am I missing something?