Looking at the address? (3-7)

I believe the answer is:

lip-reading

I'm a little stuck... Click here to teach me more about this clue!

'looking' is the definition.
Both the definition and answer are singular nouns.
Maybe there's an association between them I don't understand?

'at the address?' is the wordplay.
'at' becomes 'lip' (I can't justify this - if you can you should give a lot more credence to this answer).
'the address?' becomes 'reading' (reading is a kind of address).
'lip'+'reading'='LIP-READING'

Can you help me to learn more?

(Another definition for lip-reading that I've seen is " Interpretation by following mouth movements".)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.