Some Assembly Required
by Kegler

Ten answers get modified before entry, according to a common theme.

Some Assembly Required grid

Across
1Serving as an example of false pity, just so you know, disengaged at heart
8Vote in favor of resistance for a certain revolution?
11No trace of excitement in long story
12Crude pen fashioned with care
14E.g., one paid to box beginning to develop jab
15Book one-third of locations for political group
16Relatives express disapproval about liberal Democrat
17Unendingly tasty sticky substance
20Going out with heel, essentially, enthralled by rat
21One spinner is on
22What's behind return of Arthur's headwear? (2 wds)
25Fooling around, pose in the capital of Mexico
26Debonair Mr. Young hugs girl
27Start to push John back in swimming hole
28Leaders of effort, deep in thought, make a change
32Spot bit of difference in sum
36Deepest into S&M, crazily
37Stole watercraft, killing time
38From affiliate, we received pitcher
39Staff of one thousand and one
40Sounds like diamonds, Mary Jane Ocellus
41First off, use identical flavoring for bagels
Down
1Reportedly lash author, a mistake
2Lawn cart pulled back
3Single-celled creatures in bizarre op art zoo
4Elected official mostly supporting news
5#1 Mama stuffing complimentary meat dish
6Angers father, head to toe
7Some models accepting good hints
8Mustard and lemon, maybe, and soy, well stirred
9Stories of operations involving company up north
10Dodger contrived sports play (hyph)
12Author Eliot's empty threats
13Alcove is, lacking piece of tile, not acceptable
16Go for cherry red inside
17Clark's triangular end wall
18Standard hot rod crashed into steer
19In the end, dress up for late dinner
23Air conditioner is not working, resulting in legal proceedings
24One leaving says to train, “Back in half a heartbeat”?
29Consider feature of homemade embroidery
30Stands broken iPod on top of armoire
31Lamps lit for sacred song
33Glen's cover discussed
34Barter, putting feet up
35Returning late for the most part, doggone it

Solution