Fascinated emerging from contraption (4)
I believe the answer is:
rapt
'fascinated' is the definition.
(I've seen this in another clue)
'from contraption' is the wordplay.
'from' says the answer is hidden in the clue.
'RAPT' can be found hidden inside 'contraption'.
'emerging' is the link.
(Other definitions for rapt that I've seen before include "Part of being intent and absorbed" , "Fully engaged" , "Fully intent, fascinated" , "Enthralled, captivated" , "Absorbed and enchanted" .)