Name a companion to take to the opera (5)

I believe the answer is:

enoch

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'take to the opera' is the definition.
I can't judge whether this defines the answer.

'name a companion' is the wordplay.
'name' becomes 'eno' (I can't explain this - if you can you should give a lot more credence to this answer).
'a companion' becomes 'ch' (Companion of Honour).
'eno'+'ch'='ENOCH'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for enoch that I've seen before include "Name" , "Biblical character" , "Eldest son of Cain - the late Mr Powell" , "OT patriarch" , "Father of Methuselah" .)

I've seen this clue in the Evening Standard.

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