A feature of Hampton Court floor? (5)
I believe the answer is:
amaze
'floor?' is the definition.
(floor can mean to amaze or shock)
'a feature of hampton court' is the wordplay.
'feature of hampton court' becomes 'maze' (Hampton Court has a famous maze).
'a'+'maze'='AMAZE'
(Other definitions for amaze that I've seen before include "Surprise greatly, astonish" , "Bowl over" , "Startle" , "Dumbfound" , "Flabbergast" .)