Film seen with hesitation by northern man, lasting forever (7)
I believe the answer is:
eternal
'lasting forever' is the definition.
(something eternal will last forever)
'film seen with hesitation by northern man' is the wordplay.
'film' becomes 'ET' (E.T. the Extra-Terrestrial).
'seen with' is a charade indicator (letters next to each other).
'hesitation' becomes 'er' (sound made while hesitating - um, er).
'by northern' becomes 'n' (abbreviation e.g. N. Ireland. I am not sure about the 'by' bit.).
'man' becomes 'Al' (man's name).
'et'+'er'+'n'+'al'='ETERNAL'
Can you help me to learn more?
(Other definitions for eternal that I've seen before include "unchanged by time" , "Everlasting, not affected by time" , "with lasting benefit" , "Valid for all time" , "Lasting forever, tediously persistent" .)