Ministers in taxi in film (7)
I believe the answer is:
cabinet
'ministers' is the definition.
(I've seen this before)
'taxi in film' is the wordplay.
'taxi' becomes 'cab' (synonyms).
'film' becomes 'ET' (E.T. the Extra-Terrestrial).
'cab'+'in'+'et'='CABINET'
'in' is the link.
(Other definitions for cabinet that I've seen before include "Senior government ministers" , "Item of furniture for storage or display" , "Furniture item or collective government ministers" , "Piece of furniture or group of government ministers" , "See 18" .)