Keep still while you anaesthetise (6)
I believe the answer is:
freeze
This clue might be a double definition.
'keep still while' is the first definition.
'freeze' can be an answer for 'keep' (thesaurus). I am not certain of the 'still while' bit.
'anaesthetise' is the second definition.
(freezing is a kind of anaesthetizing)
'you' is the link.
Can you help me to learn more?
(Other definitions for freeze that I've seen before include "Peg" , "period of cold weather" , "shivering" , "Harden into ice" , "Suspend" .)