Complex sentence: Hagley (now Blakedown), Shenstone was born at the Leasowes, Halesowen, then an enclave of Shropshire within the traditional county of Worcestershire.
Split into simpler sentences: Hagley (now Blakedown), Shenstone was born at the Leasowes, Halesowen. At that time this was an enclave of Shropshire within the traditional county of Worcestershire.