If differential input (preferred), route traces tightly coupled. If single ended, have at least 3 trace width (of CLKin/OSCin trace) separation from other RF traces.
CLKouts/OSCout:
Normally differential signals should be routed tightly coupled to minimize PCB crosstalk. Trace impedance must be designed according to 100-Ω differential. For optimal isolation place different clock group signals on different layers.
VCXO connection
Shorter traces are better. Place a resistors and capacitors closer to IC except for a single capacitor and associated resistor, if any, next to VCXO. If any, place loop filter components close to VCXO Vtune pin.