Crazy shows behind lorry (10)
I believe the answer is:
moonstruck
'crazy' is the definition.
(I've seen this before)
'behind lorry' is the wordplay.
'behind' becomes 'moons' (I can't explain this - if you can you should believe this answer much more).
'lorry' becomes 'truck' (I've seen this before).
'moons'+'truck'='MOONSTRUCK'
'shows' acts as a link.
Can you help me to learn more?
(Other definitions for moonstruck that I've seen before include "Crazy" , "Lunatic" .)