Meg's broken valuable items (4)
I believe the answer is:
gems
'valuable items' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Perhaps they are linked in a way I don't understand?
'meg's broken' is the wordplay.
'broken' is an anagram indicator.
'megs' anagrammed gives 'GEMS'.
Can you help me to learn more?
(Other definitions for gems that I've seen before include "Valuable stones" , "Precious stones" , "Jewels" .)