Once more weary, went back to bed (7)

I believe the answer is:

retired

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'went back to bed' is the definition.
I can't tell whether this defines the answer.

'once more weary' is the wordplay.
'once more' becomes 're' (prefix in words like 're-emerge' or 're-enter').
'weary' becomes 'tired' (similar in meaning).
're'+'tired'='RETIRED'

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(Other definitions for retired that I've seen before include "Gone to bed" , "out of office?" , "Pensioned off" , "Withdrew from active participation" , "Went to bed or gave up work" .)

I've seen this clue in the Evening Standard.

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