Last bit of Kubrick film about politician is neat (5)
I believe the answer is:
kempt
'is neat' is the definition.
(I've seen this in another clue)
'last bit of kubrick film about politician' is the wordplay.
'last bit of' says to take the final letters.
'film' becomes 'ET' (E.T. the Extra-Terrestrial).
'about' means one lot of letters goes inside another.
'politician' becomes 'MP' (Member of Parliament).
The last letter of 'kubrick' is 'k'.
'et' placed around 'mp' is 'empt'.
'k'+'empt'='KEMPT'
(Other definitions for kempt that I've seen before include "In a neat and clean condition" , "Neat and tidy" , "Well-groomed" .)