Some freedom, I think, to exclude (4)
I believe the answer is:
omit
'exclude' is the definition.
('omit' can be a synonym of 'exclude')
'some freedom i think' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'OMIT' can be found hidden inside 'freedom i think'.
'to' acts as a link.
(Other definitions for omit that I've seen before include "Fail to use" , "Fail (to do something)" , "Leave out or undone" , "Take out" , "Drop" .)