Could he confuse Arnold with Roland? (6)
I believe the answer is:
ronald
'could he confuse arnold' is the definition.
The definition suggests a singular noun which matches the answer.
'roland?' is the wordplay.
'roland' can be anagrammed to 'RONALD'.
Though, I'm unsure how this is indicated.
'with' acts as a link.
Can you help me to learn more?
(Other definitions for ronald that I've seen before include ". . . . . . Reagan, former US president" , "Mr Reagan" , "The late President Reagan" , "Chap" .)