Radio cleaning and pre-emptive cap. repair?

I would just replace it. That would be an electrolytic, capacity is not that critical, you want at least but not less in capacitance, and at least the rated operating voltage, Last I knew, Mouser Electronics would fill small orders, and has always been helpful.

https://www.newark.com/c/passive-co...tors/leaded-aluminium-electrolytic-capacitors