Base, a garage emptied to make some film (7)
I believe the answer is:
footage
'some film' is the definition.
(footage is a kind of film)
'base a garage emptied' is the wordplay.
'base' becomes 'foot' ('foot' can be a synonym of 'base'**).
'emptied' suggests removing the centre.
'garage' with its centre taken out is 'ge'.
'foot'+'a'+'ge'='FOOTAGE'
'to make' acts as a link.
(Other definitions for footage that I've seen before include "Length of film" , "Piece of filmed material" , "Film that has been shot" , "quantity shot" , "Part of film" .)