I pulled out 9D Famously sleepy animals: KOALAS because I was convinced that it was PANDAS. All pandas do is sleep. And eat. But those things notoriously get in the way of making more pandas! Even if it’s actually for a different reason.

Theme! I now understand it!

1A Christmas classic covered by Bing Crosby and Bob Dylan, among others: BELLS.
6A Kind of gorilla: BACK.
10A Second-best era: AGE.
16D Gift of persuasiveness: TONGUE.
51D Metonym for the movie industry: SCREEN.
71A Symbol of privilege: SPOON.
70A Forks and knives, e.g.: WARE.
69A Attractive older fellow: FOX.
42D Marvel character with metallic skin: SURFER.
1D Simple solution to a big pro: BULLET.

33A With 44-Across, bit of consolation … or a feature of this puzzle’s grid?: SILVER LINING!

1A SILVER BELLS.

6A SILVERBACK.

10A SILVER AGE, 16D SILVER TONGUE, 51D SILVER SCREEN, 71A SILVER SPOON, 70A SILVERWARE, 69A SILVER FOX.

42D SILVER SURFER.

1D SILVER BULLET

Finished this one in 13:45.