An Add-A-Gram takes a word, adds a letter, and then shuffles the letters to make a new word (I guess you can call this an Add-A-Gram's Add-A-Grammar). In this game, I will define an Add-A-Gram chain, and a solution should contain the complete list of words in the chain.
For example, if I provided this definition: depend inside a race inside a counselor
The answer would be: rely -> relay -> lawyer
Here is the definition for this Add-A-Gram chain:
a constant inside the supertonic inside days of yore inside insightful one inside a dwarf wanderer inside Q.T. inside parrots inside arcane inside humour inside operations inside a treater inside a return inside hot potatoes inside nurseries
For those of you who worked on my first Add-A-Gram, n.b. I made an attempt to use less obscure words and put more work into the clues.
As I am just developing this puzzle type, I welcome your continued feedback!