Love-ins? A capital idea for a cryptic crossword

Across

1 Moves mass across surface of Earth
3 Carrot top inserted in faithless can for escapades
6 Empire head removed in revolution
10 Blurred as at end of day, perhaps start of it
11 A food riddled with holes. Wherefore? Say, albumen (2 words)
12 Core belief recalled in church aloud
13 King, perhaps, with unwrapped gift
16 Sort of music, and the Spanish dance
18 Channels inside someone’s head, and leaves
21 Perhaps a man in contact with a man, deplorably
23 Bugs town containing private eye
24 You got it!
26 A field encompassing sounds of people
29 Reverse interment proceedings, generally
30 Horsepower without horse’s home, and music
31 Washington or St. Petersburg locus
32 Bell? Sounds abrupt
33 Pieces together with small tools for an article of clothing

Down

1 Pines without end, for an object of desire
2 To find the heart of Madras, northward they travel (2 words)
3 Time in a year; part of tree descends in it
4 Pepper, tomato, garlic heads – evenly distributed in this brand
5 Like an animal, takes inside, for functional support
7 "Gangway", for example, or "ship"
8 Case participant without a name, perhaps
9 Rome’s head of diocese in heart of Carpentras (2 words)
14 Parts, maybe several, working in tandem
15 Mr. Smith with Mrs. Jones, by way of example
17 Violently removing pressure, letting it out
19 Office workers with degrees for confusing issues?
20 Within half of A.D. 2020, it nearly quadrupled upward
22 Upper part of earth, possibly mixed up with metal tools
23 Electrical device with eyes on it (2 words)
25 Audible reactions, for rapid breathing
27 A word now? No, a source, looking back
28 Bites, repeatedly, mostly firm stuff
29 Famous bit in The Sound of Music

Some initial hints are in chat. Another is that