Julienne or fillet of fish re-dressed (5)
I believe the answer is:
shred
'julienne' is the definition.
(to julienne is to cut into shreds)
'fillet of fish re-dressed' is the wordplay.
'fillet of' says the answer is hidden in the clue.
'SHRED' can be found hidden inside 'fish re dressed'.
'or' is the link.
(Other definitions for shred that I've seen before include "Scrap of material" , "Torn piece of material" , "(Reduce to) small piece(s)" , "Thin scrap or strip" , "Small piece torn from something" .)