Opening pronounced intact (4)
I believe the answer is:
hole
'opening' is the definition.
(I know that opening can be written as hole)
'pronounced intact' is the wordplay.
'pronounced' indicates a 'sounds like' (homophone) clue.
'intact' becomes 'whole' (similar in meaning).
'whole' is a homophone of 'HOLE'.
(Other definitions for hole that I've seen before include "Awkward situation" , "Predicament - golfer's target" , "depression" , "mess" , "Puncture" .)