Trinket, old remnant restyled (8)
I believe the answer is:
ornament
'trinket' is the definition.
(I've seen this before)
'old remnant restyled' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'restyled' is an anagram indicator.
'remnant' with letters rearranged gives 'rnament'.
'o'+'rnament'='ORNAMENT'
(Other definitions for ornament that I've seen before include "Decorative item" , "Turn" , "Trim" , "deck" , "Embellish" .)