Papa, enthralled by antique item, getting a copy (7)
I believe the answer is:
replica
'copy' is the definition.
(replica is a kind of copy)
'papa enthralled by antique item getting a' is the wordplay.
'papa' becomes 'p' (phonetic alphabet: alpha, bravo, charlie etc.).
'enthralled by' means one lot of letters goes inside another ('enthral' can mean 'capture').
'antique item' becomes 'relic' (I've seen this before).
'getting' means one lot of letters go next to another.
'p' going into 'relic' is 'replic'.
'replic'+'a'='REPLICA'
(Other definitions for replica that I've seen before include "Parcel I made into an exact copy" , "Reproduction, exact copy" , "Parcel I found with exact copy" , "knock-off" , "Exact copy or model" .)