Country servant plugs film (5)
I believe the answer is:
egypt
'country' is the definition.
(Egypt is a country)
'servant plugs film' is the wordplay.
'servant' becomes 'gyp' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'plugs' indicates putting letters inside (plug can mean to fill a gap).
'film' becomes 'ET' (E.T. the Extra-Terrestrial).
'gyp' put inside 'et' is 'EGYPT'.
Can you help me to learn more?
(Other definitions for egypt that I've seen before include "Moses' birthplace" , "Part of Africa" , "Where M. Antony died" , "Cleopatra's country" , "Cleopatra its queen" .)