Not frank (7)
I believe the answer is:
evasive
'not frank' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for evasive that I've seen before include "Shifty, hard to pin down" , "Trying to avoid commitment" , "Devious" , "Prevaricatory" , "Tending to avoid commitment" .)