Related Clues:
- Put nitrogen in to check gas exhaust
- Pipe suddenly lowered for sounding
- Express train finally entering test
- Air conduit
- Water carrier; channel
- Heat carrier
- It may bring a tear to one's eye
- Go on a tweetstorm, say
- Hole allowing gas or air to escape
- Conveyer of tears
- Give free expression to — opening
- Heating passage
- Opening race perhaps fails to start
- Tube for cables, etc
- With 46-Down, held together with a plumbing adhesive