handful, pinch
寽 centers on grasping a small amount with the fingers: a handful or a pinch. The two meanings are closely related, both describing a small quantity held between the fingers.
寽 combines 爫 (claw, hand) with 寸 (hand, measurement), suggesting a hand grasping or measuring a small amount. The exact historical development is uncertain, but the component combination fits the meaning of a handful or pinch.
The top 爫 is a claw-like hand reaching down, and the bottom 寸 is another hand with a measuring sense. Together they show a hand pinching a small amount, like taking a pinch of salt.
For リン, imagine a hand pinching a tiny pinch of glitteringリン (rin) gold dust. The sound of 'rin' echoes the small, precise pinch.