Awfully cheeky and unoriginal (9)
I believe the answer is:
hackneyed
'unoriginal' is the definition.
('hackneyed' can be similar in meaning to 'unoriginal')
'awfully cheeky and' is the wordplay.
'awfully' is an anagram indicator.
'cheeky'+'and'='cheekyand'
'cheekyand' anagrammed gives 'HACKNEYED'.
(Other definitions for hackneyed that I've seen before include "pedestrian" , "Overworked" , "Trite (expression)" , "Overfamiliar through overuse" , "Stereotyped" .)