Call me back about way to reach understanding (10)
I believe the answer is:
empathetic
'understanding' is the definition.
(I've seen this before)
'call me back about way' is the wordplay.
'call me back' becomes 'emetic' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'about' is an insertion indicator.
'way' becomes 'path' (synonyms).
'emetic' enclosing 'path' is 'EMPATHETIC'.
'to reach' is the link.
Can you help me to learn more?
(Other definitions for empathetic that I've seen before include "Understanding" , "Appreciating another's feelings" .)