The four starred clues are ROYAL WE, SEE YOU, DEAD CALM, and SEA MONKEY. From 59A, we can read aloud all of the right words of these two word phrases to obtain the phrase WII U COMMON KEY, matching the enumeration. The Wii U common key is a 32 digit hexadecimal number, which matches 53A. From 32D, 39A, and 8D we can infer that we have to split this number into 16 pairs, each dictating a row and a column of the puzzle. Taking the letter at each coordinate pair (ignoring the duplicated A2) we find that IT WAS ON PORPOISE, referring to the PLACE where the Wii U common key was found (on Dolphin emulator) and the INTENTIONality of this theft.
For this puzzle, the leftmost one is 0 and the rightmost one is F (abbr.)
42A
Dessert choice
43A
Altitudes (abbr.)
44A
Selfishness
47A
Main dish
49A
Surveillance org.
52A
Lucifer
53A
Evil spell, or a certain numbering system employed in this puzzle
54A
*Brine shrimp, essentially
56A
Small songbird
58A
Confess
59A
What cops are required to do for criminal suspects... or a way to interpret the starred clues together to get a description of something similar to the stolen item with enumeration (3 1 6 3), which will help you to find the meta answer
66A
Sum up
67A
High-IQ group
68A
Unacceptable
69A
Also
70A
Sword material
71A
Words on a Wonderland cake
72A
TV buying channel
73A
Hockey star Bobby
74A
Pranked with Charmin
Down
1D
Traveler's aid
2D
Nautical "Halt!"
3D
"Have a look!"
4D
Aspect of the theft revealed by the meta answer
5D
At the movies, perhaps
6D
Full-length, as a film
7D
School of thought
8D
For this puzzle, the bottommost one is 0 and the topmost one is F
9D
___ roll (winning)
10D
Slangy possessive pronoun
11D
Barking sound
12D
What 24As have
13D
Failed to be
14D
Vote in
22D
"___ queen!"
25D
Kid ___ ("Day 'N' Nite" artist)
26D
Killer whale
27D
Aspect of the theft revealed by the meta answer
28D
Trouble
29D
Sleep stage
31D
Scoundrel
32D
For example, one of the sixteen consecutive 39A/8D pairs, which you should ignore