Characters on the slope? (7)
I believe the answer is:
italics
'characters' is the definition.
(italic is a kind of character)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for italics that I've seen before include "way of writing?" , "They emphasise" , "Cursive script" , "Letters in sloping type" , "Type with slanting letters" .)