Sloping text (7)
I believe the answer is:
italics
'sloping text' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for italics that I've seen before include "Letters slanted to the right" , "Letters in sloping type" , "Sloping font" , "Type with slanting letters" , "Typeface with letters slanting to the right" .)