2089: Backward and forward

The unclued lights, (one of four words), can be arranged to form a quotation, verifiable in  ODQ. One unclued light does double duty.

Across 1  Ape hasn’t played some game (8) 6 Lawyer admitted to most of source of power of Jews (6) 13 Vicious Israeli (lacking eyes, they say?) demanded payment (5) 17 A radio broadcast includes hint of clock, like a tick (7) 18 Reason not to trust many friends, some say – a powerful fraction (7, two words) 19 Author’s material that could cryptically become soft (9) 22 Way to revise Act Four: omit court (3) 26 Being honourable, Christian prevails in the end (3) 30 Inspired theatre company’s acting to secure backing (9) 32 Give power to Jew’s opponent, not good, seizing Tubal’s capital (7) 33 When they pass on, they can’t pass on series from Dexter (Morse) (7) 35 Comedian extremely depressed within? (5) 36 Article by journalist raised questions (8) 37 Counties are light brown (5) 39 Rustic nozzles decorate Welsh pots (6) 40 Fast and furious, what’s inside sped around (8) Down 1 A slave protest, ending in sedition being crushed (14, two words) 2 Stag eats one cold old bean (7) 3 Diner was anxious to avoid calories, being frightened of Edmund (7) 4 Sloth one found in a tree lacking tail (6) 5 Chris takes this dish to be non-kosher? (4) 7 Nurse was working and recalls an oath (8) 8 Little Italian courtyard in an abbreviation (11) 9 Local advertisement in Standard needs no English (7, two words) 10 Actors feeling better, in dropping whimsical projects (14, three words) 12 Point could be so pointless (5) 15 Bad news not original to us (4) 20 Old man apparently featuring in Portia’s case (4) 22 Allowed gun to be raised round part of plant (8) 25 Distinguish French maid turning over her article? (7) 27 Timber constructed low dome (7) 28 Graduate setting most of Merchant of Venice in tree (7) 29 Divers having sex change...