
Originally Posted by
JaneE
Saw a sign in a Dairy Queen Brazier restaurant some years ago for "fried clamps." Yummy!

Umm. 
Webster's Revised Unabridged Dictionary --
Clamp
Clam\, n. [Cf. Clamp, Clam, v. t., Clammy.]
1. (Zo["o]l.) A bivalve mollusk of many kinds, especially those that are edible; as, the long clam (Mya arenaria), the quahog or round clam (Venus mercenaria), the sea clam or hen clam (Spisula solidissima), and other species of the United States. The name is said to have been given originally to the Tridacna gigas, a huge East Indian bivalve.
You shall scarce find any bay or shallow shore, or cove of sand, where you may not take many clampes, or lobsters, or both, at your pleasure. --Capt. John Smith (1616).
Clams, or clamps, is a shellfish not much unlike a coclke; it lieth under the sand. --Wood (1634).
You sure it isn't a regionalism?
Frends know gud humors when dey is hear it. ~ Da Crockydiles of ZZE.