Visited and made an appeal to (6,2)

'visited' is the definition.
('call on' can be a synonym of 'visit')

'and made an appeal to' is the wordplay.
I cannot really see how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is located in the answer.
'made' could be 'led' (leading is a kind of making) and 'led' is found within the answer.
'an' could be 'a' and 'a' is found in the answer.
'appeal' could be 'o' and 'o' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?