Form gains grade to go up a grade (10)

I believe the answer is:

aggrandise

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

'go up a grade' is the definition.
I can't tell whether this defines the answer.

'form gains grade' is the wordplay.
'form' indicates anagramming the letters.
'gains'+'grade'='gainsgrade'
'gainsgrade' anagrammed gives 'AGGRANDISE'.

'to' acts as a link.

Can you help me to learn more?

(Other definitions for aggrandise that I've seen before include "Give promotion to" , "Magnify; increase power of" , "Advance" .)

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

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