Warrant for admission is missing from home inspection (10)
I believe the answer is:
invitation
'warrant for admission' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'missing from home inspection' is the wordplay.
I cannot quite see how this works, but
'from' could be 'in' (I've seen this in other clues) and 'in' is found in the answer.
'home' could be 'at' (synonyms) and 'at' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'is' is the link.
Can you help me to learn more?
(Another definition for invitation that I've seen is " A request to participate".)