What does the cryptic crossword clue "Manicheism provides a comfortable place to be (5)" mean?

The definition is "a comfortable place to be". The wordplay uses a hidden word. hidden in [Ma]-NICHE-[ism] The answer is NICHE.

Manicheism provides a comfortable place to be (5)

Guardian Cryptic #29197 | 21 Across | 2023-10-10 flower