Sensitive types some say but they are all unique (10)
I believe the answer is:
snowflakes
'sensitive types' is the definition.
Although both the answer and definition are plural nouns, I can't understand how they can define each other.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for snowflakes that I've seen before include "Those are cold" , "Spineless sorts" .)