Missing address? (8)
I believe the answer is:
homesick
'missing address?' is the definition.
(missing a particular home or address)
This is all the clue.
(Other definitions for homesick that I've seen before include "Feeling sadness when away from family etc" , "I shock me (anag.)" , "Missing one's normal environment" , "Unhappy away" , "Nostalgic" .)