Crossword Genius

Don tries to break actual drill (5,9)

Ross

I believe the answer is:

dress rehearsal

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'don tries to break actual drill' is the definition.
I can't tell whether this defines the answer.

'don tries to break actual drill' is the wordplay.
'don' becomes 'dress' (I've seen this before).
'tries' becomes 'hears' ('hear' can be a synonym of 'try').
'to break' indicates putting letters inside.
'actual drill' becomes 'real' (I am not sure about this - if you are sure you should believe this answer much more).
'hears' placed inside 'real' is 'rehearsal'.
'dress'+'rehearsal'='DRESS REHEARSAL'

Can you help me to learn more?

(Other definitions for dress rehearsal that I've seen before include "last practice" , "trial run" , "last chance to get things right" , "Strip show doesn't need such" , "Final play run-through" .)

I've seen this clue in The Independent.
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