Stripes
by Kegler

Theme answers are modified to become new words or proper nouns before entry, using a formula to be determined by the solver.  Entries include a mathematical term not found in some dictionaries.

Across 1 Coming back to that woman is different 4 Snail smeared dyes 9 Waits, embracing right wedding participants 11 Left, abandoning dark apartment 12 Spiteful Victor with unpaid obligations 15 Actor Alan’s a boisterous lad 16 Reportedly, individual took the prize 17 Nate chewed up a chip, perhaps 19 Democrat and liberal sporting smile in confusion 21 Boat died in stormy lagoon 22 In the audience, I had watched 23 Avoid introduction, lacking hype 24 Continued describing little sister’s makeup 26 Shell company’s leader running church 29 Hack the French television source 32 One part of Macedonia 33 Actress Jennifer in “Reap” 35 Gets angry about restricted rivers 36 Asian rulers counter South American shock 37 Silly deer crosses front of private yard 38 In England, thanks premiers of the alliance

Down 1 Made unnecessary stink; rejected bad date after 6:00 2 Fight and eventually net fish 3 Rats aged badly 4 Spot one-time mine entrance 5 Certain sign of Sir Isaac losing weight 6 Greek character Lester’s slippers 7 A swing left in road 8 High, high notes finally heard 10 Stir and use ice cream 13 French city jail imprisons leader of extremists 14 Admits some cancel maneuvers (2 wds) 18 Beloved stopped carrying a note 20 Lastly, praise runners, ones who don’t stand on ceremony? 24 100-150 ampere shop device (hyph) 25 Twirling a rope works 27 Actress Vardalos is antiwar, off and on 28 Grating bit of radish into meat dish 29 Tracker essentially remains with bucks 30 In the role of Oakland ballplayers 31 Outperform club having energy 34 Rowboat loses first of oars out of the water?

Solution