Roused in astonishment having received permission... (5)
I believe the answer is:
awoke
'roused' is the definition.
(I've seen this in another clue)
'astonishment having received permission' is the wordplay.
'astonishment' becomes 'awe' (awe is a kind of astonishment).
'having received' indicates putting letters inside.
'permission' becomes 'OK' (what is said to give permission).
'awe' enclosing 'ok' is 'AWOKE'.
'in' acts as a link.
(Other definitions for awoke that I've seen before include "Became active again" , "Came to life" , "Roused from sleep" , "Ceased sleeping" , "Came out of sleep" .)