A quotation from a paratragic monody by Strepsiades in Aristophanes' Clouds (1162), rejoicing in the completion by his son Pheidippides of a course of sophistic education which should enable him to help his father cheat his pressing creditors out of their money. The monody is known to contain at least one and probably two Euripidean quotations, and elsewhere it displays some typically Euripidean stylistic features (so Angel y Espinós), so it is possible that the present headword phrase is also quoted or adapted from Euripides, though its source, if any, cannot be identified.
[1] viz. lusani/as "grief-dispeller". The word is also a common Athenian name (73 in LGPN ii s.v.), and Storey has suggested that it might allude to one of two contemporaries - Lysanias of Sphettos (PA 9324; LGPN 53), father of Aischines the Socratic (alphaiota 346, alphaiota 349), and Lysanias of Thorikos (PA 9312, LGPN 54), father of the cavalryman Dexileos (414/3-394/3) whose death in battle at Corinth is commemorated by a famous surviving monument. Storey thinks the reference is more likely to be to the former, Sommerstein (262) to the latter.
[2] Sophokles fr. 887, from an unidentified play. It is cited because of its use of a similar coined compound, pausani/as "that ends all grief" - which is likewise a common personal name, and may carry an allusion to the Spartan regent Pausanias, the victor of Plataia (for another possible implicit comparison between Agamemnon and Pausanias in Athenian tragedy, cf. Dover 156-7).
[3] sc. from the Trojan War (cf. next note).
[4] Greek atrei/dan, another coinage (from tre/w "tremble"), but this time with an indisputable allusion to the Atreidai (sons of Atreus: Agamemnon and Menelaos), the leaders of the expedition against Troy.