Name Alice’s illustrator talked of after church anniversary (10)
I believe the answer is:
centennial
'anniversary' is the definition.
(centennial is a kind of anniversary)
'name alice's illustrator talked of after church' is the wordplay.
I cannot quite understand how this works, but
'name' could be 'al' and 'al' is present in the answer.
'church' could be 'ce' (abbreviation for Church of England) and 'ce' is found within the answer.
This may be the basis of clue (or it may be nonsense).
(Other definitions for centennial that I've seen before include "special anniversary" , "Hundredth anniversary" .)