hoe, eradicate, eliminate
鉏 centers on a tool for cutting or clearing: a hoe used to dig up and remove weeds, which extends to the idea of eradicating or eliminating something unwanted.
鉏 combines 金 (metal) with 且, which likely contributes the sound and may relate to cutting or clearing. The exact historical development is uncertain.
The left side is metal 金, and the right side 且 looks like a stack of shelves. Picture a metal hoe clearing weeds from a shelf-like garden bed: 鉏 is a hoe that eradicates unwanted plants.
For ショ, imagine a short-handled hoe that makes a sharp 'sho' sound as it slices through weeds: sho -> ショ, and the metal blade eliminates the overgrowth.