Took a liberty ignoring leader and started again (7)
I believe the answer is:
resumed
'started again' is the definition.
(to resume is to start doing something again)
'took a liberty ignoring leader' is the wordplay.
'took a liberty' becomes 'presumed' (to take liberties is to behave presumptuously).
'ignoring leader' means to remove the first letter.
'presumed' with its initial letter removed is 'RESUMED'.
'and' is the link.
(Other definitions for resumed that I've seen before include "Carried on again" , "came into play again" , "Recommenced" , "Started again where one had left off" , "Started again after a break" .)