A number returned from the green in a hurry (4)
I believe the answer is:
nine
'a number' is the definition.
(nine is a number)
'returned from the green in a hurry' is the wordplay.
'returned' says the letters should be written backwards.
'from' says the answer is hidden in the clue.
'enin' is hidden within 'green in hurry'.
'enin' back-to-front is 'NINE'.
(Other definitions for nine that I've seen before include "Number for a club" , "Days Lady Jane 5 ac reigned" , "One more than fourteen across" , "dancing ladies?" , "Number of Muses and days in a Novena" .)