Facile and insincere and taking liberties? Not entirely (4)
I believe the answer is:
glib
'facile and insincere' is the definition.
(I've seen this before)
'and taking liberties? not entirely' is the wordplay.
'not entirely' indicates the answer is hidden within the clue.
'GLIB' can be found hidden inside 'and taking liberties'.
(Other definitions for glib that I've seen before include "smooth" , "Bush" , "Smooth-talking" , "freedom of speech?" , "Smooth-tongued" .)