European king in a panic provides cover for organ (7)
I believe the answer is:
earflap
'cover for organ' is the definition.
(cover for an ear)
'european king in a panic' is the wordplay.
'european' becomes 'E' (abbreviation e.g. EU).
'king' becomes 'R' (abbreviation for rex, king in Latin).
'in' means one lot of letters goes inside another.
'panic' becomes 'flap' (getting in a flap is panicking).
'a'+'flap'='aflap'
'r' going within 'aflap' is 'arflap'.
'e'+'arflap'='EARFLAP'
'provides' acts as a link.
(Other definitions for earflap that I've seen before include "Part of headgear" , "ski gear?" , "Winter hat feature" .)