Enter a clue or pattern or both:
The Clue
Nests, to Virgil (4 letter answer)
The Answer
NIDI
Tags
Notes
The answer NIDI is seen occasionally, appearing about once every 850 puzzles.
Related Clues
Nests
Breeding places
Egg depositories
Insect nests
Insects' nests
Spider nests
Spiders' nests
Nests for black widows
Definition
NIDUS as a noun:
1. (focus, focal point, nidus) = a central point or locus of an infection in an organism; "the focus of infection"
2. a nest in which spiders or insects deposit their eggs