(Entry lacking, Adler reports, in mss ATFV, and placed later in GI.)
The headword seems to be present imperative, third person plural, of the verb e)klei/pw, but see next note.
The gloss is lost, but the entry is probably a Biblical lemma, whose source contains a negative form: so e.g. Proverbs 3.3 LXX, "Let kindness and truth never leave you". See also Psalms 67.3 and 70.13. (All three instances spell the headword e)klipe/twsan, making it aorist rather than present.)