Coaches affected airs and graces endlessly (9)

'coaches' is the definition.
('carriage' can be a synonym of 'coach')

'affected airs and graces endlessly' is the wordplay.
'affected' indicates an anagram.
'and' is a charade indicator (letters next to each other).
'endlessly' means to remove the last letter.
'graces' with its last letter taken away is 'grace'.
'airs'+'grace'='airsgrace'
'airsgrace' with letters rearranged gives 'CARRIAGES'.