Crossword Puzzle Serious; sober

Clue: Serious; sober

Lack of seriousness (LEVITY with 6 letters)
Remain sober? (STAYSTAID with 9 letters)
Program for sobering up (REHAB with 5 letters)
Sober-minded (e.g. SANE with 4 letters)
Novel about the seriousness of a weather phenomenon? (RAINBOWSGRAVITY with 15 letters)
Not sober (e.g. LIT with 3 letters)
Totally, as sober (STONECOLD with 9 letters)
Soberly proper (STAID with 5 letters)
Assistant held up sober young man (AIDEDELAYEDSTAIDBLADE with 21 letters)
Staid; sober (SEDATE with 6 letters)