Register to install independent party (7)
I believe the answer is:
roister
'party' is the definition.
(I've seen this before)
'register to install independent' is the wordplay.
I cannot quite understand how this works, but
'independent' could be 'i' and 'i' is found within the answer.
'register' could be 'roster' (I've seen this in another clue) and 'roster' is located in the remaining letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for roister that I've seen before include "riot" , "Enfold" , "Be boisterous" , "Behave boisterously" , "Celebrate noisily" .)