Now line up and speak to (7)
I believe the answer is:
address
'speak to' is the definition.
(synonyms)
'now line up' is the wordplay.
'now' becomes 'AD' (AD, Anno Domini, as opposed to BC, Before Christ).
'line up' becomes 'dress' (synonyms).
'ad'+'dress'='ADDRESS'
'and' is the link.
(Other definitions for address that I've seen before include "Formal speech" , "prepare for post" , "Speak to the residence" , "Deliver a speech" , "One's postal residence." .)