As in epsilon 471, the headword noun is in the accusative case (here determined by the material given).
The main body of this entry comes from Theodoret (PG 80.1773) on Psalm 109.4 LXX (located by a TLG search); cf. Hebrews 5.6 and passim (see web address 1). A key element seems to be "first-fruits" (for which see generally alpha 1002, delta 1490, theta 536, theta 550, etc.). Christ is referred to as the first-fruits of Christianity in 1 Corinthians 15.20, 23 (see web address 2).
[1] cf. Hebrews 2.17; 5.5-10; 7.1-28.
[2] cf. 1 Corinthians 11.23-26.
[3] cf. Romans 11.16.
[4] From the dream-interpretations, in verse, attributed to Astrampsychus (alpha 4251). It is obscure on every level. First, since such additions to Suda entries are unconnected except by vocabulary with what has preceded them, it is unclear whether e)kklhsi/ais here means "churches" or more generally assemblies. Secondly, the first two of the four Greek words are grammatically troublesome. In these dream-interpretations which involve a fe/rei ("brings, leads to") formula, there is always, elsewhere, an explicit subject, whether an infinitive phrase (epsilon 4028) or a noun phrase (rho 2, chi 316). Since, therefore, it is hard to extract any sense out of e)kklhsi/ais e(stw=sin anyway, textual corruption should probably be assumed.