Raise tail (4)
I believe the answer is:
rear
I believe this clue is a double definition.
'raise' is the first definition.
(rearing is a kind of raising)
'tail' is the second definition.
('rear' can be a synonym of 'tail')
(Other definitions for rear that I've seen before include "Jump" , "parent" , "Posterior" , "Buttocks - rise up" , "what can be brought up, finally" .)