Strange, losing you and me a trinket (5)
I believe the answer is:
curio
'a trinket' is the definition.
(thesaurus)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for curio that I've seen before include "Interesting object of rarity or difference" , "Intriguing object worth collecting" , "something odd" , "Item of bric-a-brac" , "Object of interest because it is a rare or unusual" .)