Amazed a shed is not damaged (10)
I believe the answer is:
astonished
'amazed' is the definition.
('astonish' can be a synonym of 'amaze')
'a shed is not damaged' is the wordplay.
'damaged' indicates an anagram.
'shed'+'is'+'not'='shedisnot'
'shedisnot' is an anagram of 'stonished'.
'a'+'stonished'='ASTONISHED'
(Other definitions for astonished that I've seen before include "Gobsmacked" , "Greatly surprised" , "Sad one, this (anag)" , "Bowled over" , "Taken by surprise" .)