5 down
Arranged
to
have
piano
inside
played
(7)
Arranged to have piano inside played (7)
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The definition is at the end of the clue.
How the clue works
The definition is played, since SPORTED means played. Take SORTED, meaning "arranged", and slip P (piano, as in musical notation) inside it — S then P then ORTED — and you've got your answer.