No bores providing film's opening shot (2-3)
I believe the answer is:
in-off
'shot' is the definition.
(I have seen 'Foul shot' mean 'in off' so perhaps 'shot' could also mean 'in off')
'no bores providing film's opening' is the wordplay.
'bores' is an insertion indicator (to bore something can mean to drill into it).
'providing' becomes 'if' (eg 'providing it's sunny' means 'if it's sunny').
'opening' says to take the initial letters.
The initial letter of 'films' is 'f'.
'no' put inside 'if' is 'inof'.
'inof'+'f'='IN-OFF'
(Other definitions for in-off that I've seen before include "Type of cannon in billiards" , "Error in game" , "Losing hazard at billiards" , "Billiards/snooker stroke" , "Billiards/snooker shot" .)