Drill catches in concrete (9)
I believe the answer is:
rehearsal
'drill' is the definition.
(rehearsal is a kind of drill)
'catches in concrete' is the wordplay.
'catches' becomes 'hears'.
'in' indicates putting letters inside.
'concrete' becomes 'real' ('real' can be similar in meaning to 'concrete').
'hears' put into 'real' is 'REHEARSAL'.
(Other definitions for rehearsal that I've seen before include "Practice session in preparation for public performance" , "Dummy run" , "Practice in theatre etc" , "Preparation for a show" , "Dry run" .)