Subsequently not real somehow (5,2)
I believe the answer is:
later on
'subsequently' is the definition.
(subsequently means later on)
'not real somehow' is the wordplay.
'somehow' is an anagram indicator.
'not'+'real'='notreal'
'notreal' with letters rearranged gives 'LATER ON'.
(Other definitions for later on that I've seen before include "In the fullness of time" , "Afterwards" , "this evening?" , "At a subsequent time" , "'Subsequently, afterward (5,2)'" .)