I deceive a superstar (4)
I believe the answer is:
icon
'a superstar' is the definition.
(I've seen this before)
'i deceive' is the wordplay.
'deceive' becomes 'con' (I've seen this before).
'i'+'con'='ICON'
(Other definitions for icon that I've seen before include "Sprites" , "Religious painting or symbol on computer screen" , "Sacred painting or representitive figure" , "Sacred painting of Greek Orthodox Church" , "A representative or sacred picture" .)