noun, noun or participle which takes 'suru', transitive verb
grit removal; soaking shellfish to remove sand
Cooking term for soaking clams or other shellfish in salt water so they expel sand and grit before cooking.
あさりは調理する前に砂抜きが必要です。
Clams need to be soaked to remove grit before cooking.
If you don't remove the grit, sand will remain in the dish.