Crossword Puzzle Further down?

Clue: Further down?

Preschool downtime (NAP with 3 letters)
Where many go downhill (ASPEN with 5 letters)
Severe downturn (TAILSPIN with 8 letters)
It's usually going downhill (TOBOGGAN with 8 letters)
Downloadable alert (RINGTONE with 8 letters)
Complaint about a beau that sounds downright optimistic? (THISGUYSTHELIMIT with 16 letters)
Hampshire Downs (SHEEP with 5 letters)
Downed dinner (ATE with 3 letters)
"Downstairs" person (MAID with 4 letters)
Cause of Icarus's downfall (SUN with 3 letters)