The Foxer

Rumpus, the youngest of the defoxing annexe cats, is a regular Heinz-Wolfgang Schnaufer. Every day as dusk approaches he scrambles onto the roof of the log store to await the evening bat exodus. Every morning Maxine arrives to find the front step littered with downed Pipistrelles. We've tried collar bells, security lights, and stern ultimatums but our one-cat Kammhuber Line just keeps on killing.

This cryptic collage has a hidden theme.

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SOLUTIONS

Last week's word ladder:

20. f o s s a Malagasy moggy? (Rorschach617, Gothnak, AbyssUK)
19. t e s s a This Quincy resident packs a punch (unsolved)
18. p e s s e Dutch roadbuilders found a staggeringly old vehicle near here (Gothnak)
17. p e s k y Fred, Velma, Daphne, Shaggy and Scoob (Gothnak)
16. h u s k y Unit in Afghanistan ’11 (Little_Crow)
15. b u s b y Headgear for hussars (Stugle)
14. d u s t y [A] Ambitious agri aircraft (Gothnak)
13. s t u d y Adjacent to the library and the hall (Gothnak)
12. e t u d e  A famous one was inspired by the Cadet Revolution (Rorschach617)
11. c r u d e Can be heavy, sweet or synthetic (Stugle)
10. c r u s h Short-lived US city (unsolved)
09. t r u s s Type of bridge (Arioch_RN)
08. d r e s s Uniform that never sees combat (Arioch_RN)
07. g r a s s Word that can go after couch and elephant (Rorschach617)
06. g r a c e Aichi product (AFKAMC)
05. t r a c k Can be used as improvised armour armour (Rorschach617)
04. c l a c k Steam loco component (Stugle)
03. c l a r e Destroyer that served both the USN and RN (Rorschach617, Gothnak)
02. a l a r m SEAD tool (AFKAMC, Little_Crow)
01. a l a c k