Find it in one's heart to answer upstart in Meath town (6)
I believe the answer is:
atrium
'find it in one's heart' is the definition.
I can't tell whether this definition defines the answer.
'answer upstart in meath town' is the wordplay.
'answer' becomes 'a' (abbreviation eg in Q and A).
'upstart' becomes 'u' (start of the word 'up').
'in' indicates putting letters inside.
'meath town' becomes 'trim' (I can't justify this - if you can you should give a lot more credence to this answer).
'u' placed within 'trim' is 'trium'.
'a'+'trium'='ATRIUM'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for atrium that I've seen before include "Entrance hall" , "High central hall in large building" , "Church vestibule" , "Central area in a building, open or glass-roofed" , "Central court of old Roman house, or heart cavity" .)