Involved in a quest for relics of a bygone age (8)
I believe the answer is:
antiques
'relics of a bygone age' is the definition.
'antiques' can be an answer for 'relics' (I've seen this before). I'm unsure of the 'of a bygone age' bit.
'involved in a quest' is the wordplay.
'involved' indicates anagramming the letters (involved can mean confusing or complex).
'in'+'a'+'quest'='inaquest'
'inaquest' with letters rearranged gives 'ANTIQUES'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for antiques that I've seen before include "Objects grown valuable with age" , "They have to be over a hundred years old" , "Such old items may be valuable" , "Twenty-one old items" , "eg Old furniture" .)