3d.4lets.N?o?. It's a gas ,one repeated endlessly.
4d.6lets.E?g???. Young flier,for instance, holding a permit.
8d.6lets.?e????. Inadequacy of paintings he had put up outside.
11a.4lets.E?g?. Consequently, making some progress, but in the wrong direction.
12a.2words.4.6.???l ?i?h??. Benevolent type ,one hopefully contributing money to water supplier.
15a.8lets.?e?e?r??. Scientific activity that's hard after careers ruined.
18a.6lets.?c?i?m. Major split in church is dividing ends of spectrum.