barn, stable
廏 centers on a sheltered building for housing livestock: a barn or stable.
廏 combines 广 (building with a roof) with a complex inner component that likely contributed sound and meaning related to stables or livestock. The exact historical development of the inner part is uncertain.
Under the broad roof 广, picture a busy stable with feeding troughs and hay: the inner strokes suggest stalls and tools for caring for horses.
For キュウ, imagine a stable where a horse named 'Q' (kyuu) is kept: Q -> キュウ, and the stable is its home.