Amazed the echo is lacking beneath small lorry (13)
I believe the answer is:
thunderstruck
'amazed' is the definition.
(synonyms)
'the echo is lacking beneath small lorry' is the wordplay.
'echo' becomes 'e' (phonetic alphabet: alpha, bravo, charlie etc.).
'is lacking' suggests deleting specific letters.
'beneath' becomes 'under' (under means beneath or underneath).
'small lorry' becomes 'struck' (I am not sure about this - if you are sure you should believe this answer much more).
'the' with 'e' taken out is 'th'.
'th'+'under'+'struck'='THUNDERSTRUCK'
Can you help me to learn more?
(Other definitions for thunderstruck that I've seen before include "Dumbfounded" , "Completely taken aback" , "Very surprised, shocked" , "Extremely surprised" , "Amazed" .)