Go out of your way to be boring about film (6)
I believe the answer is:
detour
'go out of your way' is the definition.
(to detour from a planned route)
'boring about film' is the wordplay.
'boring' becomes 'dour'.
'about' indicates putting letters inside.
'film' becomes 'ET'.
'dour' going around 'et' is 'DETOUR'.
'to be' acts as a link.
(Other definitions for detour that I've seen before include "Way round the roadblock" , "A way around or deviation from intended route" , "Non-direct route" , "Go round an obstruction" , "Routed (anag.)" .)