Huh? 'Clamped beam' or 'clamped boundary condition' is a standard English word used in structural analysis. Actually I don't even know of another word to describe it. Therefore I used 'clamped rear spar' to describe a continuous rear spar at the root, or one that has such a connection to the fuselage that bending moments can be transfered. 'Simply supported rear spar' would be the equivalent description of a pin-jointed rear spar.