Last seen in:
Related Clues:
- See 20-Across
- Out of sight
- Unseen
- Like a spy's ink?
- Impossible to see
- Hidden, like some exports
- Home base hides relative, so unseen
- Hidden - imperceptible
- Like the prime number eluding da Vinci, extremely hidden
- Like Blake's volant annelid
- Like Ellison's chap encountered on the stair by Hughes Mearns
- Letter in the Tacitus collection
- Man from Wells who's impossible to discern?
- Blake's night flier
- Blind bishop is about to occupy home base