Magician with no trick to show panel member (5)
I believe the answer is:
juror
'panel member' is the definition.
(I've seen this before)
'magician with no trick' is the wordplay.
'magician' becomes 'conjuror' (synonyms).
'with no' is a deletion indicator.
'trick' becomes 'con' (a con is a fraud or trick).
'conjuror' with 'con' taken out is 'JUROR'.
'to show' is the link.
(Other definitions for juror that I've seen before include "Court panellist" , "person to deliver verdict" , "One of 12 in court" , "Member of panel in court" , "One empanelled in court" .)