Like the glass uncle Arthur has (5)
I believe the answer is:
clear
'like' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?
'glass uncle arthur has' is the wordplay.
'has' indicates a hidden word.
'CLEAR' is hidden within 'glass uncle arthur'.
'the' acts as a link.
Can you help me to learn more?
(Other definitions for clear that I've seen before include "bound over" , "Make a profit - brighten up" , "Unobstructed" , "Transparent - free of obstruction" , "Acquit" .)