Crossword Genius

To print annals at changes to the substance transfer procedure (15)

Ross

I believe the answer is:

transplantation

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'the substance transfer procedure' is the definition.
I can't judge whether this definition defines the answer.

'to print annals at changes' is the wordplay.
'changes' indicates an anagram.
'to'+'print'+'annals'+'at'='toprintannalsat'
'toprintannalsat' anagrammed gives 'TRANSPLANTATION'.

'to' is the link.

Can you help me to learn more?

(Other definitions for transplantation that I've seen before include "organ trading" , "Transferral to another place" , "The moving of a seedling or tree" , "conveying" .)

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