Crossword Genius

Doctrine kids read endlessly (4)

Ross

I believe the answer is:

idea

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'doctrine' is the definition.
(thesaurus)

'kids read endlessly' is the wordplay.
'kids' becomes 'id' (I am not sure about this - if you are sure you should believe this answer much more).
'endlessly' says to take the centre (the ends of the words are removed).
The middle of 'read' is 'ea'.
'id'+'ea'='IDEA'

Can you help me to learn more?

(Other definitions for idea that I've seen before include "Purpose" , "Thought, belief" , "Proposal" , "Intention" , "Aim" .)

I've seen this clue in The Guardian.
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