Crossword Genius

Kept at it - ever right with speed wrong (10)

Ross

I believe the answer is:

persevered

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

'kept at it' is the definition.
I can't judge whether this defines the answer.

'ever right with speed wrong' is the wordplay.
'right' becomes 'r' (common abbreviation).
'with' says to put letters next to each other.
'wrong' indicates anagramming the letters.
'ever'+'r'+'speed'='everrspeed'
'everrspeed' is an anagram of 'PERSEVERED'.

Can you help me to learn more?

(Other definitions for persevered that I've seen before include "Was not deterred" , "Kept going" , "didn't give up" .)

I've seen this clue in the Sydney Morning Herald.
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