Related Clues:
- Thin spacer
- Material to stop leaks
- Bond shared between two creatures
- Mammal and insect getting closer?
- Impervious gap filler
- Impervious filler
- Slip pipe down the middle in time
- Material for plugging leaks
- Wedge filling a gap
- Carpenter's leveling device
- Filler hardened around aluminium article
- Aquatic insect devouring last of krill, something to fill a gap
- A plug for the trainee - in the main a hard worker
- Cement-like substance binding insect to mammal
- Main line worker gets protective covering