ælan
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.
ælan
l. ǽlan, and add: I. to kindle light, fire Hí fýr ǽlað, Wal. 22. Ne scyle nán mon blǽcern ǽlan under mittan, Past. 43, 2. Ǽldon adolent, incendunt, Germ. 402. 68. II. to burn up. v. Ph. 222: 526: Cri. 813 (in Dict.). III. to burn, expose to fire what is not consumed Se deópa seáð giémeð gǽsta, ǽleð hý mid ðý ealdan líge, Cri. 1547. [Se geréfa hét bringen leaden fæt, and hét hit mid wætere áfyllan, and dyde hit ǽlen swýþe hát, Nar. 46, 4.]
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.

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A Combined List of Abbreviations.