Rebels in 'shocking units' led by soldiers (7)
I believe the answer is:
revolts
'rebels' is the definition.
(revolting is a kind of rebelling)
'shocking units led by soldiers' is the wordplay.
'shocking units' becomes 'volts' (volt is a kind of unit. I am not sure about the 'shocking' bit.).
'led by' says to put letters next to each other (some letters go in front of others).
'soldiers' becomes 're' (Royal Engineers).
'volts' after 're' is 'REVOLTS'.
'in' is the link.
Can you help me to learn more?
(Other definitions for revolts that I've seen before include "Acts of defiance" , "Disgusts" , "Rebels" .)