Pull back in the rear as usual (7)
I believe the answer is:
regular
'usual' is the definition.
('regular' can be similar in meaning to 'usual')
'pull back in the rear' is the wordplay.
'pull' becomes 'lug' (I've seen this before).
'back' says the letters should be written backwards.
'in' indicates putting letters inside.
'lug' reversed gives 'gul'.
'gul' inserted inside 'rear' is 'REGULAR'.
'as' is the link.
(Other definitions for regular that I've seen before include "Perishes" , "Customary; done frequently" , "In accordance with a fixed order" , "Routine" , "Predictable" .)