She dreads wearing tiara (9)
I believe the answer is:
headdress
'tiara' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'she dreads wearing' is the wordplay.
'wearing' is an anagram indicator (wear can mean to become damaged).
'she'+'dreads'='shedreads'
'shedreads' with letters rearranged gives 'HEADDRESS'.
Can you help me to learn more?
(Other definitions for headdress that I've seen before include "ceremonial gear" , "Eg, mitre, crown" , "capital cover" , "Ceremonial wear" , "Hat or tiara, say" .)