flet
This might be just a supplemental entry adding to an entry in the Main Volume.
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
flet
II. In 1. 5 for' L. ln.' l. L. Alf., and add Hraðe wæs gerýmed fédegestum flet innanweard, B. 1976. Ic on flette mæg ríncum secgan naman þára wihta, Rä. 43, 5 : Víd. 3. lc seah in heall, þǽr hæleð druncon, on flet beran wudutreów, 56, 2: 57, 12: B. 1647: 1036. Hé mid fǽmnan on flet gǽð, 2034: 2054. Þæt hié him óðer flet eal gerýmdon, healle and heáhsetl, 1086. Land eal geondhwearf, . . . Méda máddumselas, . . . Filistina flet, Sal. 192. [v. N. E. D. flet.]
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.