Makes improvements re the shapes (7)

I believe the answer is:

reforms

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'makes improvements' is the definition.
'reforms' can be an answer for 'improvements' (reform is a kind of improvement). I am unsure of the 'makes' bit.

're the shapes' is the wordplay.
'the shapes' becomes 'forms' ('form' can be a synonym of 'shape').
're'+'forms'='REFORMS'

Can you help me to learn more?

(Other definitions for reforms that I've seen before include "Adjustments" , "Changes for improvement" , "Makes changes" , "Mends ways, abandons badness" .)

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

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