Each answer is made up of two words. The words are identical with the exception of one letter. All words are six letters.

Example: a famous castaway becomes a pointer or Ginger -> Finger

-1. A superhero turns into someone who collects money from illicit activities.
-2. an ancient "book" turns into a promenade
-3. sauce making step becomes an adder?
-4. a fall becomes a street fight
-5. a seed becomes an animal shelter
-6. a prop turns into a catch
-7. a group of posts becomes a danger
-8. brood becomes a skiers delight
-9. missing becomes approval
-10. an excited state of agitation turns to languish

9. absent = assent

Hi Cue.

10. dither - wither

7. thread/threat

2. scroll/stroll

5 - kernel - kennel

8-ponder - powder

4. Tumble - rumble

Yep!

3. simmer summer

1. Batman - bagman

6. crutch/clutch

That's a wrap! Great job!