Extra Effort
by Kegler

Fifteen answers get modified before entry; you won't be able to get them without 20A 32A.

Extra Effort grid

Across
1Straw in swamp surrounding SoCal airport
6Left difficult shot for Kegler
11Prominent person is not tellin’ the truth, we hear
13Young boy grabs ring right away
15Operating energy unit
16Partially clean a gray horse
17Western foundation supports large social gatherings
18Noisily, as a prank, “decorate” certain dwelling
19Flirt in Tolstoy's final trilogy
20See instructions
21Skater Heiden tossing rice
23Sweetheart briefly comes back in Japanese drama
24Fight with senior hugging dad
27Links South Africa with customs
28Metal prong with point broken off
29Blade is part of orange peeler
30Actor John is injured
32See instructions
35Mr. Turner, the heartless Democrat
36Cold, corrupt cretin at heart
37Farmer I noticed carrying sheep
39Desert creature showed up, then left
40Tight, like a WASP?
41Influential economist's presentation ultimately taken in by one thousand eyes
42Flower came up
Down
1Shaping softer woods
2I learn about traveling from point to point
3Drink very quietly with leader of opposition in Syrian city
4Helmet adequately protects character from Greece
5Patching bizarre bedtime headgear
6Thus, Charcoal Chunk's nickname
7Capital city bridges go slowly
8Ringing a great many returning fish
9See there, a couple of losers
10A big fan of Toni, surprisingly
12New York's embracing Ms. Coulter; help!
14Spy confused smart clairvoyant
16Renault shifts gear
22Skies above finally parting for refuges
23Catch Reagan holding up a tiny thing
25Regressing, steal spare part?
26A dissenting vote about cat's body structure
27Beer mug's clone eventually seen in foreign delis
30Meeting's leader loses opener for locks
31Cuts back attack, finally, unable to proceed
33Singer returns with sailor
34Tells about transgressions involving clergymen, essentially
36Mention vision to the audience
37Minnesota welcomes excellent players
38Reportedly purchase tournament pass

Solution