The Clue Maker (me) breaks the word down into parts and describes those parts.
Thus, Putting 'r' into 're or deer' in the only likely location gives us:
"reorderer' which is a fair substitute for 'Anagram Maker"!
That's All For Now!
Here is the example clue again:
24. Anagram maker is about either deer or last within (9)
In the clue above, the phrase after 'Anagram maker' is:
'about either deer or last within'.
Hint #1:'About' is many times a replacement for 're', and 'either' is many times a replacement for 'or'.
Hint #2: 'or last within' means 'take the last letter of 'or' and put it inside of the phrase 're or deer'.