fæt
This might be just a supplemental entry substituting part of an entry in the Main Volume.
Related §§ in Wright's OE Grammar:
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
fæt
ornament. l. fǽt. For "fætum, befeallen . . . with ornaments, shall be fallen off" substitute fætum befeallen . . . shall be stripped of ornaments ; and see next word.
This is a supplementary entry with editorial changes to an entry in the main volume of the dictionary. Look under the 'Possibly connected entries' below, or for the same headword in the list to the left.

A Combined List of Abbreviations.

Abbreviation not recognized. See:

A Combined List of Abbreviations.