Ordered gold pair -- that may be recklessly extravagant (8)
I believe the answer is:
prodigal
'recklessly extravagant' is the definition.
(prodigal can mean spending money recklessly)
'ordered gold pair' is the wordplay.
'ordered' indicates an anagram.
'gold'+'pair'='goldpair'
'goldpair' with letters rearranged gives 'PRODIGAL'.
'that may be' acts as a link.
(Other definitions for prodigal that I've seen before include "Extravagant - lavish" , "Wastefully extravagant" , "Recklessly wasteful or extravagant" , "Grip load (anag.)" , "Improvident" .)