Not right now
'not right now' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for later on that I've seen before include "At a subsequent time" , "this evening?" , "Afterwards" , "'Subsequently, afterward (5,2)'" , "In the fullness of time" .)
'not right now' is the definition.
(I've seen this in another clue)
This is all the clue.