(1d) Finally it's important in the golf society's season. (8, 3.) _ _ O _ S _ _ _ _ _ P.
(15a) Examining (7) _ _ _ _ _ N _ .
(17D) Get pours out to create a convenient sourde of outdoor warmth (8) S _ _ E _ G _ O .
(18d) Organic source of energy. (7) _ I _ _ A _ S.