barn, stable
廐 centers on a sheltered building for housing animals, specifically a barn or stable.
廐 combines the building enclosure 广 with a phonetic component that likely contributed the sound キュウ. The exact historical development of the inner part is uncertain.
Under the broad roof 广, imagine a sheltered space with feeding troughs and hay, a perfect barn or stable for animals.
For キュウ, picture a stable boy shouting 'Q!' (kyuu) to call the horses: Q -> キュウ, and the horses come to the barn.