Time in the morning to repeat some percussion (3-3)
I believe the answer is:
tam-tam
'some percussion' is the definition.
(thesaurus)
'time in the morning to repeat' is the wordplay.
'time' becomes 't' (abbreviation).
'in the morning' becomes 'am' (AM on a clock).
'to repeat' says to double the letters.
't'+'am'='tam'
'tam' doubled is 'TAM-TAM'.
(Other definitions for tam-tam that I've seen before include "Large orch. gong" , "Large musical gong" , "Percussion instrument" , "Large metal gong" .)