| Clue | Source | Date |
|---|---|---|
| Curbs, limits | Irish Times Simplex | 01 Mar 2016 |
| Puts the brakes on | New York Times | 24 Jun 2015 |
| Puts a damper on | The Chronicle of Higher Education | 29 May 2015 |
| Puts a damper on | ||
| Puts the brakes on | ||
| Represses | ||
| Puts a damper on | ||
| Blocks | ||
| Blocks | ||
| Curbs | ||
| Restrains | ||
| Restrains. |