Ladies changing conceptions of perfection (6)
I believe the answer is:
ideals
'conceptions of perfection' is the definition.
The answer and definition can be both related to thinking as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'ladies changing' is the wordplay.
'changing' is an anagram indicator.
'ladies' is an anagram of 'IDEALS'.
Can you help me to learn more?
(Other definitions for ideals that I've seen before include "Moral standards" , "100%? > 10 out out of 10? > With capital, more would want these" , "High standards for ladies" , "Moral value" , "Lofty aims for ladies" .)