One hoping not to get stumped later is coming up with worker getting to grips with popular Rising (4,3,2)

'one hoping not to get stumped later' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'coming up with worker getting to grips with popular rising' is the wordplay.
'coming up' becomes 'next' (I've seen this in another clue).
'with' says to put letters next to each other.
'worker' becomes 'man' (man is a kind of worker).
'getting to grips with' indicates putting letters inside.
'popular rising' becomes 'ni' (I can't justify this - if you can you should believe this answer much more).
'man' enclosing 'ni' is 'manin'.
'next'+'manin'='NEXT MAN IN'

'is' is the link.

Can you help me to learn more?