A feature of Hampton Court intended, we hear, to create perplexity (9)
I believe the answer is:
amazement
'perplexity' is the definition.
'a feature of hampton court intended we hear' is the wordplay.
'feature of hampton court' becomes 'maze' (Hampton Court has a famous maze).
'intended' becomes 'meant' (meaning is a kind of intending).
'we hear' indicates a 'sounds like' (homophone) clue.
'meant' sounds like 'ment'.
'a'+'maze'+'ment'='AMAZEMENT'
'to create' is the link.
(Other definitions for amazement that I've seen before include "Wonder" , "Incredulity" , "Great astonishment" , "Stupefaction" , "Astonishment, wonderment" .)