Crossword Genius

Marvellous word for a caretaker in New York? (5)

Ross

I believe the answer is:

super

I'm a little stuck... Click here to teach me more about this clue!

'marvellous' is the definition.
(I've seen this before)

'word for a caretaker in new york?' is the wordplay.
I cannot quite see how this works, but
'a' could be 'per' and 'per' is found in the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for super that I've seen before include "Topnotch, terrific" , "Exceptional" , "of high quality" , "Peerless" , "First-rate, top-notch" .)

I've seen this clue in The Telegraph.
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