Passing copper traces between two THT pins
When I was doing through-hole boards, I think I used 12 mil tracks for most signals, and 60 mil pads on most components, leaving 14 mil spacing between track and pad.

I you had set your default track width for autorouting to 24 mils the autorouter would have been unable to route that track, but a narrower track is fine.

There appears to be a thin red track running vertically there - if that's on the copper layer, you have a problem!!