An embargo ended drives leader wild! (9)
I believe the answer is:
abandoned
'wild' is the definition.
(I've seen this before)
'an embargo ended drives leader' is the wordplay.
'an' becomes 'a'.
'embargo' becomes 'ban' (a ban on trade).
'ended' becomes 'done' (I've seen this in another clue).
'leader' says to take the initial letters.
The initial letter of 'drives' is 'd'.
'a'+'ban'+'done'+'d'='ABANDONED'
(Other definitions for abandoned that I've seen before include "Deserted - shameless" , "without any reservations at all" , "lacking in self-control" , "Gave up - left - being completely irresponsible" , "Left in the lurch, forsaken" .)