Overly glib (3)
I believe the answer is:
pat
'overly glib' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for pat that I've seen before include "Gentle stroke of the hand with fluent repetition" , "Tap lightly" , "Light touch or stroke" , "Touch; name" , "Touch gently; glib" .)