Crossword Puzzle Basic condition

Clue: Basic condition

They're basically quarters (SEASONS with 7 letters)
Basic ideas (GISTS with 5 letters)
Air-conditioned (e.g. COOL with 4 letters)
Basic thread (PLOT with 4 letters)
Under the most favorable conditions (ATBEST with 6 letters)
Foul weather condition? (DISGUSTINGWINDS with 15 letters)
Change the condition of a fish part? (and three words that can follow BLUE and RED, but not WHITE) (SHIFTFINSTATE with 13 letters)
Basic learning (ABC with 3 letters)
Muscular condition (TONE with 4 letters)
Basic bit (ATOM with 4 letters)