Film featuring Germany’s extremists and power in the country (5)
I believe the answer is:
egypt
'the country' is the definition.
(Egypt is a country)
'film featuring germany's extremists and power' is the wordplay.
'film' becomes 'ET' (E.T. the Extra-Terrestrial).
'featuring' means one lot of letters goes inside another.
'extremists' suggests removing the centre (letters on the extreme ends of the word).
'and' says to put letters next to each other.
'power' becomes 'p' (symbol in physics).
'germany' with its middle removed is 'gy'.
'gy'+'p'='gyp'
'et' placed around 'gyp' is 'EGYPT'.
'in' acts as a link.
(Other definitions for egypt that I've seen before include "N. African country" , "Moses' birthplace" , "Country of Pharaohs" , "Where Cavafy wrote" , "Cairo's country" .)