Transported in a broken-down trap (4)
I believe the answer is:
rapt
'transported' is the definition.
(both can mean enchanted or fascinated)
'a broken-down trap' is the wordplay.
'a broken down' is an anagram indicator.
'trap' with letters rearranged gives 'RAPT'.
'in' acts as a link.
(Other definitions for rapt that I've seen before include "Enraptured, entranced" , "Delighted" , "Enthralled, captivated" , "Fully absorbed" , "riveted" .)