Lying under oath? Not for every panel (4)
I believe the answer is:
jury
'panel' is the definition.
(synonyms)
'lying under oath? not for every' is the wordplay.
'lying under oath?' becomes 'perjury' ('perjury' can be a synonym of 'lying under oath').
'not' indicates named letters should be taken away.
'for every' becomes 'per' (I've seen this before).
'perjury' with 'per' taken out is 'JURY'.
(Other definitions for jury that I've seen before include "Judging panel" , "Verdict deliverers" , "JUDY] right for department? > This will decide" , "Committee of examiners" , "Panel of adjudicators" .)