Typographical embellishment (5)
I believe the answer is:
serif
'typographical embellishment' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for serif that I've seen before include "Short line at the end of the main strokes of a printed character" , "Part of letter" , "Line on written letters" , "Projection at a letter's end" , "One feature of text" .)