PITCHERWITS

1a. Country warden (with grouse?) (10) 15a. Sticks to bishops? (8) 1d. Athletic? Casting my eye over... (9) 8d. Oh dear dear! (9) 5a. Carborundum so-and-so! (8) 18a. Piercing to go for current cost (5,5) 2d. Vague — and dodgy? (7) 10d. Courtiers not to go on boat (7)