Pretend hoarding gold is strange (7)
I believe the answer is:
foreign
'strange' is the definition.
('foreign' can be similar in meaning to 'strange')
'pretend hoarding gold' is the wordplay.
'pretend' becomes 'feign' ('feign' can be a synonym of 'pretend').
'hoarding' indicates putting letters inside.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'feign' going around 'or' is 'FOREIGN'.
'is' is the link.
(Other definitions for foreign that I've seen before include "Non-native" , "Concerning other nations" , "Of or from another country" , "Unfamiliar; from abroad" , "Alien" .)