Insubordinate, spreading sedition around base (11)
I believe the answer is:
disobedient
'insubordinate' is the definition.
('disobedient' can be similar in meaning to 'insubordinate')
'spreading sedition around base' is the wordplay.
'spreading' indicates anagramming the letters.
'around' indicates putting letters inside.
'base' becomes 'bed' (bed is a kind of base).
'sedition' with letters rearranged gives 'disoient'.
'disoient' placed around 'bed' is 'DISOBEDIENT'.
(Other definitions for disobedient that I've seen before include "Ignoring instructions" , "Naughty" , "Going against instructions" , "Rebellious" .)