To print annals at changes to the substance transfer procedure (15)
I believe the answer is:
transplantation
'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" .)