A lady has been sent round again? So soon? (7)
I believe the answer is:
already
'so soon?' is the definition.
(already can mean sooner than expected)
'a lady has been sent round again?' is the wordplay.
'has' says to put letters next to each other.
'been' becomes 'a' (I can't justify this - if you can you should give a lot more credence to this answer).
'sent round' is an insertion indicator.
'again?' becomes 're' (prefix meaning 'again').
'lady' after 'a' is 'alady'.
'alady' going around 're' is 'ALREADY'.
Can you help me to learn more?
(Other definitions for already that I've seen before include "Indication of impatience (US)" , "By the time in question" , "Previously" , "Even this soon" , "earlier than might have been expected" .)