Deployed spy on his suggestion (8)

I believe the answer is:

hypnosis

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

'suggestion' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.

'deployed spy on his' is the wordplay.
'deployed' indicates an anagram.
'spy'+'on'+'his'='spyonhis'
'spyonhis' anagrammed gives 'HYPNOSIS'.

Can you help me to learn more?

(Other definitions for hypnosis that I've seen before include "Sleeplike state induced by suggestion" , "State induced by suggestion, resembles sleep" , "Trance-like state, induced by suggestion" , "Sleeplike state in which mind responds to suggestions" , "Mental state induced by suggestion" .)

I've seen this clue in The Independent.

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.