Surprise from a labyrinth meant adult is lost (9)
I believe the answer is:
amazement
'surprise' is the definition.
(thesaurus)
'a labyrinth meant adult is lost' is the wordplay.
'labyrinth' becomes 'maze' ('maze' can be a synonym of 'labyrinth').
'adult' becomes 'a'.
'is lost' indicates named letters should be taken away.
'meant' with 'a' taken out is 'ment'.
'a'+'maze'+'ment'='AMAZEMENT'
'from' acts as a link.
(Other definitions for amazement that I've seen before include "Great surprise" , "Astonished reaction" , "Shock" , "Wonder" , "Astonishment, wonderment" .)