Overused phrase (6)
I believe the answer is:
cliche
'overused phrase' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cliche that I've seen before include "Nothing new in that, so to speak" , "Trite phrase" , "Overused expression" , "Saying grown familiar through repetition" , "Tired 21/12 [TURN OF PHRASE]" .)