Crossword Puzzle Past the prime

Clue: Past the prime

They're past their prime (HASBEENS with 8 letters)
One past his prime (NOSPRINGCHICKEN with 15 letters)
River past Thebes (NILE with 4 letters)
Lady past her prime (NOSPRINGCHICKEN with 15 letters)
Gets past a last difficulty ... or a hint to this puzzle's theme (ROUNDSTHECORNER with 15 letters)
Adjective for some past-their-prime musicians (BLOATED with 7 letters)
Past its prime (e.g. ALLWASHEDUP with 11 letters)
Past its prime, and then some (ROTTEN with 6 letters)
Past prime time? (LATEINLIFE with 10 letters)
Past one's prime (e.g. AGED with 4 letters)