Performer on Britain’s Got Talent, perhaps, to trick panellist (8)
I believe the answer is:
conjuror
'performer' is the definition.
(I know that conjuror is a type of performer)
'trick panellist' is the wordplay.
'trick' becomes 'con' (a con is a fraud or trick).
'panellist' becomes 'juror' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'con'+'juror'='CONJUROR'
'on britain's got talent perhaps to' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for conjuror that I've seen before include "One performing tricks" , "Performing magician" , "Magical entertainer" , "Prestidigitator" , "A sleight-of-hand entertainer" .)