Individual with German backing for investment? Not subsequently (2,4)
I believe the answer is:
on time
'not subsequently' is the definition.
(on time rather than later or subsequently)
'individual with german backing for investment?' is the wordplay.
'individual' becomes 'one' (an individual is one person).
'with german' becomes 'mit' ('with' in German).
'backing' shows that the letters should be reversed in order.
'for investment?' is an insertion indicator.
'mit' backwards is 'tim'.
'one' placed around 'tim' is 'ON TIME'.
(Other definitions for on time that I've seen before include "Not running late" , "Punctual, not late" , "Arriving when due" , "without delay" , "(Of train) not late" .)