Tory on leave immediately (5,4)
I believe the answer is:
right away
'immediately' is the definition.
(synonyms)
'tory on leave' is the wordplay.
'tory' becomes 'right' (I've seen this before).
'on leave' becomes 'away' (I've seen this in another clue).
'right'+'away'='RIGHT AWAY'
(Other definitions for right away that I've seen before include "This very minute, without delay" , "without hesitation" , "This instant, without delay" , "Immediately" , "in no time" .)