Willing to change, father and lawyer return to board (9)
I believe the answer is:
adaptable
'willing to change' is the definition.
I can't tell whether this definition defines the answer.
'father and lawyer return to board' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'and' is a charade indicator (letters next to each other).
'lawyer' becomes 'da' (abbreviation for District Attorney).
'return' shows that the letters should be reversed in order.
'to board' becomes 'table' (synonyms).
'pa'+'da'='pada'
'pada' back-to-front is 'adap'.
'adap'+'table'='ADAPTABLE'
Can you help me to learn more?
(Other definitions for adaptable that I've seen before include "Able to adjust to circumstances" , "Versatile" , "Able to adjust to new conditions" , "Open to modification" , "Amenable to change, malleable" .)