Superficial display takes everyone in (7)
I believe the answer is:
shallow
'superficial' is the definition.
(similar in meaning)
'display takes everyone in' is the wordplay.
'display takes' becomes 'show' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'everyone' becomes 'all' (all people).
'in' indicates putting letters inside.
'show' going around 'all' is 'SHALLOW'.
Can you help me to learn more?
(Other definitions for shallow that I've seen before include "Of water, not deep" , "justice" , "Without depth" , "Having little depth" , "requiring no serious thought" .)