Old remnant ripped by trinket (8)
I believe the answer is:
ornament
'trinket' is the definition.
(I've seen this before)
'old remnant ripped by' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'ripped' is an anagram indicator.
'by' is a charade indicator (letters next to each other).
'remnant' is an anagram of 'rnament'.
'o'+'rnament'='ORNAMENT'
(Other definitions for ornament that I've seen before include "Turn" , "small decorative object" , "Knick-knack" , "Decorate" , "grace" .)