Promised Land lacking an amazing wedding venue (4)
I believe the answer is:
cana
'amazing wedding venue' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'promised land lacking an' is the wordplay.
'promised land' becomes 'can' (I can't justify this - if you can you should give a lot more credence to this answer).
'lacking' means to remove the last letter (the word is incomplete or lacking).
'an' with its last letter removed is 'a'.
'can'+'a'='CANA'
Can you help me to learn more?
(Other definitions for cana that I've seen before include "Village where Christ turned water into wine." , "Village where Christ changed water to wine" , "Town of Gospel wedding feast" .)