Frank provides a sort of camera (6)
I believe the answer is:
candid
I believe this is a double definition.
'frank' is the first definition.
(I know that frank can be written as candid)
'a sort of camera' is the second definition.
'provides' acts as a link.
(Other definitions for candid that I've seen before include "Honest and open about what one thinks" , "Impartial" , "Blunt; frank" , "Open and truthful" , "'Forthright, open (6)'" .)