Take liberties when I object to purse being changed (7)
I believe the answer is:
presume
'take liberties' is the definition.
(I've seen this in another clue)
'i object to purse being changed' is the wordplay.
'i object' becomes 'me' ().
'to' means one lot of letters go next to another (I've seen this in other clues).
'being changed' is an anagram indicator.
'purse' is an anagram of 'presu'.
'me' after 'presu' is 'PRESUME'.
'when' acts as a link.
(Other definitions for presume that I've seen before include "Take to be the case" , "Supreme (anag)" , "Suppose without proof" , "Surmise" , "Suppose; take liberties" .)