Partial Answer
- Kingdom's famous sherpa leaves greatest top, gets second award (6)
NORWAY – Norgay minus g plus w
- Animated series presumed ending with vocal piece (5)
DARIA - D plus Aria
- Sumerian city falls, ending Sufi celebration (3)
URN - City of Ur plus n
- Decapitated cat charged particle (3)
ION - CATION minus CAT