I lengthen changes in order to educate (9)

I believe the answer is:

enlighten

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'to educate' is the definition.
(I've seen this before)

'i lengthen changes in' is the wordplay.
'changes' indicates anagramming the letters.
'in' indicates putting letters inside.
'lengthen' is an anagram of 'enlghten'.
'i' going inside 'enlghten' is 'ENLIGHTEN'.

'order' is the link.
This may not be correct. It may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for enlighten that I've seen before include "Illuminate" , "Give instruction" , "Give information to" , "Brief" , "remove prejudice" .)

I've seen this clue in The Independent.

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