Short film in English not lacking love, it's plain (7)
I believe the answer is:
evident
'plain' is the definition.
(I know that plain can be written as evident)
'short film in english not lacking love' is the wordplay.
'short film' becomes 'vid' (short for video; 'short' indicates an abbreviation).
'in' indicates putting letters inside.
'english' becomes 'E' (abbreviation).
'not lacking love' becomes 'ent' (I am not sure about this - if you are sure you should believe this answer much more).
'e'+'ent'='eent'
'vid' placed inside 'eent' is 'EVIDENT'.
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for evident that I've seen before include "Clearly apparent" , "Quite obvious, easy to see" , "Visible - plain" , "Obvious, quite apparent" , "Plain, obvious, clear" .)