| Clue | Source | Date |
|---|---|---|
| Trade restrictions, impose ... | ||
| Publishing restrictions making Garbo seem happy | ||
| Trade barriers | Irish Times Simplex | 26 Feb 2020 |
| Complete blocks | New York Times | 29 Mar 2018 |
| Complete blocks | ||
| Confused ambler, left out, goes to barrier | ||
| Commercial blockers? | ||
| Legal prohibitions on commerce | ||
| Restrictions imposed on commerce. |