Source of power that made Nero great (9)

I believe the answer is:

generator

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

'source of power' is the definition.
'generator' can be an answer for 'source' (synonyms). I'm unsure of the 'of power' bit.

'made nero great' is the wordplay.
'made' indicates anagramming the letters.
'nero'+'great'='nerogreat'
'nerogreat' is an anagram of 'GENERATOR'.

'that' acts as a link.

Can you help me to learn more?

(Other definitions for generator that I've seen before include "Electricity producer" , "It gives power" , "Eg, dynamo" , "Engine to produce electricity" , "Creator" .)

I've seen this clue in The Globe and Mail.

Want a hint initially instead of a full solution? Install my app