Complicated process to have millions put in capital part (9)
I believe the answer is:
rigmarole
'complicated process' is the definition.
(rigmarole means a complex or involved process)
'millions put in capital part' is the wordplay.
I cannot quite understand how this works, but
'millions' could be 'm' (abbreviation) and 'm' is present in the answer.
'capital' could be 'riga' (capital of Latvia) and 'riga' is found within the remaining letters.
'part' could be 'role' (eg a theatrical role) and 'role' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'to have' acts as a link.
Can you help me to learn more?
(Other definitions for rigmarole that I've seen before include "A grim role for long rambling statement" , "Performance" , "fuss" , "long, tedious business" , "Long, complex stuff" .)