Victor leaves Glen at musical to go wild in the city, perhaps (9)

I believe the answer is:

alleycats

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'go wild in the city perhaps' is the definition.
I know nothing about this answer so I can't judge whether this works.

'victor leaves glen at musical' is the wordplay.
'victor' becomes 'V' (phonetic alphabet: alpha, bravo, charlie etc.).
'leaves' is a deletion indicator.
'glen' becomes 'valley' (I've seen this before).
'at musical' becomes 'cats' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'valley' with 'v' taken out is 'alley'.
'alley'+'cats'='ALLEYCATS'

'to' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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