Understanding Leasehold in TPA: The Confusion Continues...

I'm stuck on Leasehold in Transfer of Property Act, 1882 (TPA). Textbooks always say it's a bundle of lease rights that the lessee gets from the lessor, but honestly, it's still unclear. I need a real-life example or simple definition to make sense of it. For instance, if someone takes a flat on lease from a society, is it leasehold? If the lessee can sell or transfer the right to another person, are they still considered a lessee or have they become the owner? Can anyone share a concrete example of leasehold in India and how it's treated in court? Some clarity on this would be a huge help for my CUET PG Law exams!