Here’s the Solutions grid

The Ambigram has been highlighted in red. It reads “WOW and MOM” and the same message can be read even if the grid is turned upside down.

The Oracle had also used MOM or various versions of MOM in a number of themed clues – These included 11A – MA, 43A – MUM, 57A- SUPERMOM, 10D – MATER, 27D – MOM and 37D – MUMMY. A number of clues also contained some version of “Mom” in them and all these occurences have been highlighted in Yellow.

Here are the Annotations:

Across: 8 MOM ENT, 9 CARD A MOM, 11 MAn, 12 DD, 13 ME ME, 15 TRAM<, 18 Telescopic, 19 WEDnesday, 21 E(V)E, 22 MA O, 23 PEA*, 24 W A D, 26 IMP ASS E, 30 O PTI MUM, 33 A TT IC, 34 THERMOS*, 36 LAMA< GAMe, 38 Telescopicx2, 42 LAW*, 43 DD, 46 (1 Bar is approximately one Pascal), 47 ~flew, 49 Telescopic, 50 DD, 53 ~Hide, 55 Telescopic, 56 G O, 57 (RUM POEMS)*, 59 (-j+M)UMBLE.

Down: 1 Telescopic, 2 MER E, 3 STY E, 4 DD, 5 MARG<, 6 DD, 7 DOdo, 8 SMALL*, 10 (A TERM)*, 13 POM<, 14 MUM PS, 16 TEA* UP, 17 ATE*, 19 Upside down MOM, 20 DA D, 25 Where dad-mom say, “I do”, 27 MOM for Mars Orbiter Mission, 28 ARThur, 29 EARwig, 30 Telescopic<, 31 I L L, 32 U SA, 35 DD, 37 DD, 38 FLEe<, 39 E MU, 40 AB(B)ES, 41 A RM, 44 stALE, 45 AD AG E, 48 LOO(M)S, 51 CD,DD, 52 (DAMSEL-AD)*, 53 HO ME, 54 Telescopic, 58 DD, 60 LosAngeles.

Here’s the link to the “Hall of Fame”

Thanks to “The Oracle” for this enjoyable puzzle and to all of you who participated.