Substance Electra recreated (7)

I believe the answer is:

treacle

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'substance' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

'electra recreated' is the wordplay.
'recreated' indicates an anagram.
'electra' is an anagram of 'TREACLE'.

Can you help me to learn more?

(Other definitions for treacle that I've seen before include "Something cloyingly sweet" , "flattery" , "Thick syrup from sugar cane" , "Syrup, molasses" , "Dark viscous 11" .)

I've seen this clue in The Irish Independent.

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