List includes Independent Party (7)
I believe the answer is:
roister
'party' is the definition.
(I've seen this before)
'list includes independent' is the wordplay.
I cannot quite see how this works, but
'independent' could be 'i' and 'i' is found within the answer.
'list' could be 'roster' (roster is a kind of list) and 'roster' is found in the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for roister that I've seen before include "riot" , "Be boisterous" , "Enfold" , "Engage in party activity" , "Have noisy fun" .)