Military event ought to tire band in formation (9,6)
I believe the answer is:
edinburgh tattoo
'military event' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'ought to tire band in formation' is the wordplay.
'in formation' indicates anagramming the letters.
'ought'+'to'+'tire'+'band'='oughttotireband'
'oughttotireband' anagrammed gives 'EDINBURGH TATTOO'.
Can you help me to learn more?
(Other definitions for edinburgh tattoo that I've seen before include "A military display" , "Military show" .)