Mythical Queen accomplished nothing (4)

I believe the answer is:

dido

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'mythical queen' is the definition.
'dido' can be an answer for 'queen' (legendary queen of Carthage). I'm unsure of the 'mythical' bit.

'accomplished nothing' is the wordplay.
'accomplished' becomes 'did' (to do something is to accomplish it).
'nothing' becomes 'O' (looks like zero - 0).
'did'+'o'='DIDO'

Can you help me to learn more?

(Other definitions for dido that I've seen before include "In Roman mythology, she committed suicide when abandoned by Aeneas" , "Character in Purcell opera" , "Ancient queen of Carthage" , "Classical suicide" , "Founding queen of Carthage (did next to nothing!)" .)

I've seen this clue in The Times.

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