Related Clues:
- None too quick on the uptake
- Like depleted uranium
- Packed with ideas, as an essay
- Practically impenetrable
- Hard to get through
- Thick, like fog
- Thick wooded valley around the point
- Quilt work would be so sporadic
- Several rooms with one key? Stupid!
- Unreliable pilot's first yacht capsized
- Not very bright — needs to be properly organised
- Dim woman lacks ego
- Needs to be close
- Compressed - obtuse
- Tightly packed - stupid