Not about to wrap present up immediately (9)
I believe the answer is:
thereupon
'immediately' is the definition.
Both the answer and definition are adverbs. Perhaps there's a link between them I don't understand?
'not about to wrap present up' is the wordplay.
'about' says the letters should be written in reverse.
'to wrap' means one lot of letters goes inside another.
'present' becomes 'here' (both can mean in attendance).
'not' reversed gives 'ton'.
'here'+'up'='hereup'
'ton' enclosing 'hereup' is 'THEREUPON'.
Can you help me to learn more?
(Other definitions for thereupon that I've seen before include "immediately after that" , "straight afterwards" , "Shortly after that" , "at that point" , "straightaway" .)