Liam's damned passport got lost (7)
I believe the answer is:
mislaid
'lost' is the definition.
(similar in meaning)
'liam's damned passport' is the wordplay.
I cannot really understand how this works, but
'passport' could be 'id' (a passport is identification) and 'id' is found within the answer.
This explanation may well be incorrect...
'got' acts as a link.
Can you help me to learn more?
(Other definitions for mislaid that I've seen before include "Temporarily lost" , "not to be found?" .)