Surprised by there not being an address? (10)
I believe the answer is:
speechless
'surprised' is the definition.
Both the definition and answer are adjectives. Maybe you can see an association between them that I don't see?
'there not being an address?' is the wordplay.
I cannot quite understand how this works, but
'not' could be 'less' (I've seen this in other clues) and 'less' is found within the answer.
'address?' could be 'speech' ('speech' can be a synonym of 'address') and 'speech' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'by' acts as a link.
Can you help me to learn more?
(Other definitions for speechless that I've seen before include "being forced to improvise?" , "Dumbstruck" , "Struck dumb" , "Unable to say anything" , "In shock" .)