| CHURR | Vibrating call of the nightjar (5) |
| POORWILL | Nocturnal bird of the nightjar family of central and western North America (8) |
| YODEL | The call of the mountains? (5) |
| LLANWYNNO | Forest of Rhondda Cynon Taf in South Wales, noted for the nightjar (9) |
| EVEJAR | Dialectal word for the nightjar, nocturnal European bird (6) |
| SPINNER | Salad whirler; or, a name for the nightjar (7) |
| NIGHTHAWK | Nocturnal bird related to the nightjar - could be short-tailed or rufous-bellied (9) |
| GABLE | Buck changed his luck in film, "The Call of the Wild" |
| SPITZ | Buck's adversary in 'Call of the Wild' |
| WHIPPOORWILL | Nightjar of the eastern USA (4-4-4) |
| POLAND | Part of Europe in which to see nightjar settle? |
| AXEBIRD | Nightjar of northern Queensland and New Guinea (7) |
| JACKLONDON | Author of the 1903 novel The Call of the Wild on which the 2020 movie is based: 2 wds. |
| WHITEFANG | Title of Jack London's The Call of the Wild companion novel that follows the eponymous wolf-dog's journey from wild to tame (5,4) |
| HOOHOO | Call of the owl! Call of the owl! |
| THOMAS | Poet and creator of the fictional fishing village "Llareggub", who, in Fern Hill, reflects on his childhood visits to his aunt's farm in Wales, including its apple boughs, foxes, nightjars, owls and p |
| FERN | Cryptogamous plant esteemed by pteridomaniacs and roosting nightjars and whose furled fronds are depicted at the heads of fiddles (4) |
| CHUCKWILLSWIDOW | Dear Anne Hathaway, this is a large nightjar |
| BIRD | Satanic nightjar or nightingale |
| DORHAWK | Ambassador hawkish sheltering nightjar (7) |
