This might be just a supplemental entry substituting part of an entry in the Main Volume.
calwa
.Substitute: In Wrt. Voc. ii. 99, 80: 6, 54 occurs the gloss alapiciosa calwa. The latter word seems to be Latin; cf. alapiciosus caluus in other glossariem. v. Corp. Gl. H. xli.
Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "calwa." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 115.