My unit involved in open uprising (6)
I believe the answer is:
mutiny
'open uprising' is the definition.
'mutiny' can be an answer for 'uprising' (mutiny is a kind of uprising). I'm not certain of the 'open' bit.
'my unit involved' is the wordplay.
'involved' indicates anagramming the letters (involved can mean confusing or complex).
'my'+'unit'='myunit'
'myunit' anagrammed gives 'MUTINY'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for mutiny that I've seen before include "Military rebellion" , "Rising, rebellion" , "Open rebellion by sailors or soldiers" , "Open rebellion against constituted authority" , "Rebellion as on Bligh's Bounty" .)