US -- it wrongly will remove leaders with force (8)
I believe the answer is:
strongly
'with force' is the definition.
(I've seen this before)
'us it wrongly will remove leaders' is the wordplay.
'us' becomes 's' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'it' becomes 't' (abbreviation. e.g. in 'tis).
'will remove leaders' means to remove the first letter.
'wrongly' with its initial letter removed is 'rongly'.
's'+'t'+'rongly'='STRONGLY'
Can you help me to learn more?
(Other definitions for strongly that I've seen before include "hard" , "In a forceful manner" , "With power or strength" , "With force" , "In a powerful manner" .)