| Answer | Crossword Clue |
|---|---|
| GUM | Clog (up) |
| STOP | Clog (up) |
| CONGEST | Clog up |
| GUM | Clog, with "up" |
| UNSTOP | Clear up a clog |
| CLOG | Block up |
| DAM | Block up |
| STOP | Block (up) |
| EMBAR | Block up. |
| CLOG | Block up. |
| CHOKE | Block up. |
| CHOKE | Block up |
| DAM | Block (up) |
| ADS | What pop-up blockers block |
| STYMIE | Throw up a stumbling block |
