'U' is also confused with retro 'Y' (7)

I believe the answer is:

sloaney

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'u' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'also confused with retro y' is the wordplay.
I cannot quite see how this works, but
an anagram of 'also' is 'sloa' which is within the answer.
'y' is found in the answer.
The remaining letters 'ne' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'is' acts as a link.

Can you help me to learn more?

I've seen this clue in The Telegraph.

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