Term that's musical or legal perhaps (7)

I believe the answer is:

allegro

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'term that's musical' is the definition.
I know that 'musical' relates to this answer.

'or legal perhaps' is the wordplay.
'perhaps' indicates an anagram.
'or'+'legal'='orlegal'
'orlegal' with letters rearranged gives 'ALLEGRO'.

Can you help me to learn more?

(Other definitions for allegro that I've seen before include "Musically fast and lively - legal or what?" , "Brisk and lively tempo, musically" , "(In music) a brisk and lively tempo" , "Brisk musical piece" , "musical term" .)

I've seen this clue in The Globe and Mail.

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