Clones come from mature plants.. so that’s technically like a 3+ month old plant genetically..
At that point it has pistils at all nodes, that’s just a sign of sexual/reproductive maturity..
If they start to cluster and see lots of pistils on that node then it’s flowering for whatever reason..
But I have some mothers in Veg that look like this that were never in 12/12.. they’re just mature and ready for flower