Friendliness of group about to paint new house, empty inside (8)
I believe the answer is:
bonhomie
'friendliness' is the definition.
(bonhomie is a kind of friendliness)
'group about to paint new house empty inside' is the wordplay.
I cannot quite understand how this works, but
'about' could be 'on' (as in a book 'on' a certain topic) and 'on' is found in the answer.
'house' could be 'ho' (abbreviation for house) and 'ho' is located in the answer.
'empty' could be 'e' (abbreviation e.g. on guages) and 'e' is found within the answer.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for bonhomie that I've seen before include "'Easy good nature, cheerful friendliness (8)'" , "Warmth" , "good humour" , "Genial manner from hobo in me" , "Inventory" .)