Fabric favored by Pepys (4)
I believe the answer is:
lace
'fabric favored by pepys' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lace that I've seen before include "Spike - ornamental fabric" , "Fine open fabric" , "Shoestring: delicate ornamental fabric" , "Delicate open-web fabric" , "Flimsy fabric or shoe fasterner" .)