Late 40s male- gym routine to tone up recommendation

Yes, I think the several replies above recommending addressing diet are completely on point. This also aligns directly with what the OP's goals are, also - more upper body definition.

I would say the activity levels indicated by the OP - even putting aside the cycling - are well above the average. There's no reason body composition can't significant improve if that is maintained, and calorie intake comes down.

This is simple but not easy. I would, personally, much rather train hard than actually have to eat in a calorie deficit, but that is definitely the best option on the table.

The good news is that when someone does eat in a deficit, and brings their weight down, calories can be increased then to maintenance, which is easier to sustain. Or even, at that point, go into a slight surplus and dial up the resistance training to add muscle mass.

There's this idea, in everyday Irish discourse, the the weight can "pile back on", after people lose weight, and it's like a mystery or some kind of inevitability. It reminds me of the myth that muscle tissue literally turns to fat if you don't keep lifting. People seem to be able to conceptualise that exercise and diet result in weight loss, but they imagine there's some elastic rebound effect that results in the weight being gained back. In terms of what really matters, there isn't - weight gain after weight loss is always just people backsliding into a heavy surplus.

As mentioned above by DilemmaDan, tracking calories, maybe via an app like MyFitnessPal, would be a good place to begin. It doesn't have to be a sustained thing, but if you are honest, then the tracking will tell you straight off whether you're actually eating in a large surplus, on a daily basis, which may be the case. Then you can taper that off. There's no need to go straight into eating in a big deficit, start small and see how you go from there.

You could benefit hugely from introducing resistance training, 2-3 days a week, I would opt for full body sessions. Doing that probably would result in building some lean muscle mass that might actually leave you "looking better" (and certainly feeling better). Even if your body fat % remained the same, adding mass in the chest and shoulders, for example, can help to offset a broad waist / thick midline. But if you really want definition, then dropping body fat % is the way to go.

Even for people who do a lot of resistance training, and have moderately good body composition, if they want specific things like arms and shoulders that pop, like the see in magazines and on instagram, there's a chunk of it which comes down to having low body fat, once you have the muscle.