Piece of bric-a-brac inquisitive American dropped off (5)
I believe the answer is:
curio
'piece of bric-a-brac' is the definition.
'curio' can be an answer for 'bric-a-brac' (I've seen this in another clue). I am unsure of the 'piece of' bit.
'inquisitive american dropped off' is the wordplay.
'inquisitive' becomes 'curious' (synonyms).
'american' becomes 'US' (United States).
'dropped off' suggests deleting specific letters.
'curious' with 'us' taken out is 'CURIO'.
Can you help me to learn more?
(Other definitions for curio that I've seen before include "Rare and unusual item" , "something odd" , "Bygone" , "Object that is interesting, being rare or unusual" , "Unusual, intriguing object" .)