Catches during Spanish club's practice session (9)
I believe the answer is:
rehearsal
'practice session' is the definition.
(rehearsal is a kind of practice session)
'catches during spanish club's' is the wordplay.
'catches' becomes 'hears' (catch can mean to hear or pick up).
'during' means one lot of letters goes inside another.
'spanish club' becomes 'real' (Real Madrid).
'hears' put inside 'real' is 'REHEARSAL'.
(Other definitions for rehearsal that I've seen before include "Dummy run" , "Dry run" , "Preparation for a show" , "Practice - run-through" , "Drill" .)