Notice the attire as you speak to (7)
I believe the answer is:
address
'speak to' is the definition.
(synonyms)
'notice the attire' is the wordplay.
'notice' becomes 'ad' (both can mean an advertisement).
'the attire' becomes 'dress' (synonyms).
'ad'+'dress'='ADDRESS'
'as you' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for address that I've seen before include "Sermon - lodging" , "Where one lives" , "details on envelope" , "Attend" , "prepare for post" .)