Break, perhaps, in panel (6)
I believe the answer is:
injury
'break perhaps' is the definition.
(break is a kind of injury)
'in panel' is the wordplay.
'panel' becomes 'jury' ('jury' can be a synonym of 'panel').
'in'+'jury'='INJURY'
(Other definitions for injury that I've seen before include "Physical damage, harm" , "Wound" , "One of Dumas's three musketeers" , "Contusion" , "wrongful action" .)