Picture every second of film era (5)
I believe the answer is:
image
'picture' is the definition.
('image' can be a synonym of 'picture')
'every second of film era' is the wordplay.
'every second of' means one should take alternating letters.
'era' becomes 'age' (I've seen this before).
The alternating letters of 'film' are 'im'.
'im'+'age'='IMAGE'
(Other definitions for image that I've seen before include "Likeness of person or thing" , "Iconic representation" , "Likeness or mental picture" , "Reflection" , "sculpture" .)