Arthur and I have difficulty — eating this? (9)
I believe the answer is:
artichoke
'difficulty eating this?' is the definition.
The definition suggests a singular noun which matches the answer.
'arthur and i have' is the wordplay.
'arthur' becomes 'art' (Art can be short for Arthur).
'and' is a charade indicator (letters next to each other).
'have' becomes 'choke' (I can't explain this - if you can you should believe this answer much more).
'art'+'i'+'choke'='ARTICHOKE'
Can you help me to learn more?
(Other definitions for artichoke that I've seen before include "Globe, perhaps" , "Thistle-like plant with edible heads" , "Jerusalem, perhaps" , "something often associated with Jerusalem" , "Jerusalem or globe?" .)