Solitude: year wasted in a boring manner (9)

I believe the answer is:

tediously

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

'in a boring manner' is the definition.
I can't tell whether this definition defines the answer.

'solitude year wasted' is the wordplay.
'year' becomes 'y'.
'wasted' is an anagram indicator.
'solitude'+'y'='solitudey'
'solitudey' is an anagram of 'TEDIOUSLY'.

Can you help me to learn more?

(Other definitions for tediously that I've seen before include "in a way sleep-inducing?" , "in a laborious way" .)

I've seen this clue in The Independent.

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