Tackle joke by guys in a movie (9)
I believe the answer is:
equipment
'tackle' is the definition.
(tackle can mean equipment or gear)
'joke by guys in a movie' is the wordplay.
'joke' becomes 'quip' (quipping is a kind of joking).
'by' means one lot of letters go next to another.
'guys' becomes 'men' (guy can mean a man).
'in' indicates putting letters inside.
'a movie' becomes 'ET'.
'quip'+'men'='quipmen'
'quipmen' put into 'et' is 'EQUIPMENT'.
(Other definitions for equipment that I've seen before include "4 [TACKLE]" , "Items needed for a particular purpose" , "Apparatus, gear" , "outfit" , "fitting" .)