Passiflora, perhaps? What’s your zone?

The fruit are on a Passiflora vine climbing through the other plant. Note the three lobed alternate leaves, the tendrils and shrivelled flower of the vine. Quite different from the opposite elliptical leaves of what appears to be a herbaceous perennial.

Thank you both! I'm in 7b. I've never seen the fruits before, although I've seen many passion flower vines.

Could you hold the fruit and take the picture with one of its nearest leaf?

The plant has been identified from the picture provided as a Passiflora. Given the location, both geographically and habitat, I’d say it’s P incarnata, Maypop.

There seems to be a Verbesina on the left and a Helianthus or Heliopsis on the right, along with the Passiflora.