Coat for pupil a crone tailored (6)
I believe the answer is:
cornea
'coat for pupil' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'a crone tailored' is the wordplay.
'tailored' indicates an anagram (the letters are customised ).
'a'+'crone'='acrone'
'acrone' is an anagram of 'CORNEA'.
Can you help me to learn more?
(Other definitions for cornea that I've seen before include "Transparent part of the eye" , "It covers the eye" , "Body part" , "Clear front layer of eye" , "Observer section?" .)