| INCISIVE | One who is clear thinking and sharp is fourth in Nice shuffle (8) |
| THIEF | One who is fourth in line after a rich man (5) |
| ADVENT | Today is fourth Sunday of ---- (6) |
| DEREK | With 34-Across former Yankee who is fourth on Major League Baseball's career earnings list |
| APHORISM | Saying I'm sharp is wrong, and getting old (8) |
| ACUTANCE | How sharp is this partner's second reminder, about to beat clubs (8) |
| LUCIDITY | Clear thinking with good fortune capturing thicko with no love for king (8) |
| ATTITUDE | Way of thinking and behaving (8) |
| CHESHIRE | He's rich, eccentric and fourth in line for county (8) |
| ADDICTED | Can't get enough of smashing caddie going around fourth in Portmarnock with director (8) |
| CULTIVAR | Plant genetically modified on September the fourth in transport (8) |
| BENHOGAN | Golfer who's fourth in number of PGA Tour wins, with 64: 2 wds. |
| ANNARBOR | Michigan city where Jesse Owens broke three world records and equalled a fourth in a 45-minute spell, at the 1935 Big Ten championship |
| ANDYREID | Kansas City Chiefs coach who's fourth in all-time wins, the most of any active coach: 2 wds. |
| LEFTWING | Sports side departed, getting victory against fourth in league |
| LUCID | Capable of thinking and expressing yourself in a clear and consistent manner (5) |
| TRAIT | From one sharp is standing outside, which is characteristic(5) |
| NOESIS | In psychology, the mental process used in thinking and perceiving |
| UNIMAGINABLE | 'Proper punctuation is both the sign and the cause of clear thinking. If it goes, the degree of intellectual impoverishment we face is ___.' Lynne Truss |
| OUSTED | From one, sharp, is driven round the district (6) |
