Temple ornament (5)
I believe the answer is:
tiara
This clue might be a double definition.
'temple' is the first definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'ornament' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for tiara that I've seen before include "Jewelled head wear" , "it goes to one's head!" , "Top decoration" , "It might go to one's head" , "Woman's crescent-shaped ornamental headdress" .)