word - Mrs. Malaprop Reads A Riddle

I, Mrs. Malaprop, will recite an original riddle, perspired by this puzzle. Each of lines 1-5 inscribe a part of a word, put them together in sequins to get the one-word answer to the riddle.

First Part: According to the psychiatrist, this is it I suppose.
Second Part: A token creation, the forest is my home.

Third Part: My mood is subjective, though it sometimes depends.
Fourth Part: In the list of apostles, I am one off from the tenth.
Fifth Part: An onion? No, I'm the polar opposite.
Sixth Part: Put us together and what do you get?

For those who love challenge, use what you now know.
If you want more direction, please see below.

This is similar to the word riddle linked above, with the exception that it is being read by the fictional Mrs. Malaprop for whom the word malapropism is named. As a result, each line of the riddle contains a malapropism. Correct the false words and solve the riddle. A correct answer should contain the words that she meant to use in each line in addition to the final word obtained.

Answer

First Part: According to the psychiatrist, this is it I suppose.

Malapropism: "it" -> "id". Solution: id.

Second Part: A token creation, the forest is my home.

Malapropism: "token" -> "Tolkien". Solution: Ent.

Third Part: My mood is subjective, though it sometimes depends.

Malapropism: "subjective" -> "subjunctive". Solution: if. (thanks @dennisdeems)

Fourth Part: In the list of apostles, I am one off from the tenth.

Malapropism: "apostles" -> "epistles" -> "letters". Solution: I. (thanks @GentlePurpleRain and @BaileyM)

Fifth Part: An onion? No, I'm the polar opposite.

Malapropism: "onion" -> "anion". Solution: cation. (thanks @CodeNewbie)

Sixth Part: Put us together and what do you get?

IDENTIFICATION