Doing well, friend lacking airs and graces (10)
I believe the answer is:
informally
'lacking airs and graces' is the definition.
I can't tell whether this definition defines the answer.
'doing well friend' is the wordplay.
'doing well' becomes 'in form'.
'friend' becomes 'ally' (an ally is a friend or supporter).
'inform'+'ally'='INFORMALLY'
Can you help me to learn more?
(Other definitions for informally that I've seen before include "in relaxed fashion" , "off the record" , "in relaxed manner" .)