drǽfan
This might be just a supplemental entry adding to 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.
drǽfan
AddHér drǽfde Eádgár þá preóstas on Ceastre of Ealdan mynstre, Chr. 964; P. 116, 1. Ǽghwæþer óþerne út drǽfde, 887; P. 80, 29. Hér man drǽfde út Ælfgife, 1037; P. 161, 9. Æþelréd man drǽfde út of his earde, Wlfst. 160, 14. Tó drǽfene pulsaturam, An. Ox. 4865. [Goth. draibjan: O. H. Ger. treiben.]
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.