Opening rerigerator if icepack's concealed (7)
I believe the answer is:
orifice
'opening' is the definition.
(I know that opening can be written as orifice)
'rerigerator if icepack's concealed' is the wordplay.
'concealed' says the answer is hidden in the clue.
'ORIFICE' is hidden in the letters of 'rerigerator if icepack'.
(Other definitions for orifice that I've seen before include "Aperture" , "Bodily opening, mouth of cavity" , "Hole, opening" , "Bodily hole" , "For CIE, I look for an opening" .)