Unsafe to associate with head missing coarse material about new cases (7)
I believe the answer is:
uncanny
'unsafe' is the definition.
Both the answer and definition are adjectives. Maybe there's an association between them I don't understand?
'associate with head missing coarse material about new cases' is the wordplay.
I cannot really understand how this works, but
'associate' could be 'an' (AN is an example) and 'an' is located in the answer.
'about' could be 'c' (abbreviation for 'circa') and 'c' is found within the answer.
'new' could be 'n' (common abbreviation eg NT for New Testament) and 'n' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for uncanny that I've seen before include "Odd, strange" , "Weird - strange" , "Strange, beyond the normal" , "Eerie" , "Extraordinary - strange" .)