Leader of Soviet revolt stifles resistance, causing shock (10)

I believe the answer is:

surprising

I'm a little stuck... Click here to teach me more about this clue!

'shock' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'leader of soviet revolt stifles resistance' is the wordplay.
'leader of' indicates taking the first letters.
'revolt' becomes 'uprising' (synonyms).
'stifles' means one lot of letters goes inside another.
'resistance' becomes 'r' (electronics abbreviation).
The first letter of 'soviet' is 's'.
'uprising' placed around 'r' is 'urprising'.
's'+'urprising'='SURPRISING'

'causing' is the link.

Can you help me to learn more?

(Other definitions for surprising that I've seen before include "Mildly astonishing" , "Unexpected" , "Causing astonishment" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.