The Times Concise puzzle clues 2019 Dec 02

• Clear, logical, convincing Crossword Clue
• Conceited; useless Crossword Clue
• Doughnut shape Crossword Clue
• Each year Crossword Clue
• Extremely hard work Crossword Clue
• German submarine Crossword Clue
• Hose or piping Crossword Clue
• In flower Crossword Clue
• Magnificent; mint — Crossword Clue
• Mild aversion Crossword Clue
• Noise of a slow engine Crossword Clue
• People in authority (informal) Crossword Clue
• Return Crossword Clue
• Reusable launcher Crossword Clue
• Small airfield Crossword Clue
• Studier of resistance to diseases Crossword Clue
• Underhand trickery Crossword Clue