This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 拲 is uncertain. It visually combines 共 (top) and 手 (bottom), but the original semantic or phonetic role of these components is unclear.
With 共 (together) above 手 (hand), imagine two hands working together, but since the meaning is uncertain, treat this as a visual placeholder.
For キョウ, imagine two hands (手) working together (共) in a cooperative (協, きょう) effort: 協 -> キョウ.