Removing skin around swelling, as form of prepping (10)
I believe the answer is:
parboiling
'removing' is the definition.
The definition and answer can be both related to change as well as being present participle verbs.
Maybe there's an association between them I don't understand?
'skin around swelling as form of prepping' is the wordplay.
I cannot really understand how this works, but
'around' could be 'o' (a round letter) and 'o' is present in the answer.
'as' could be 'in' (I've seen this in other clues) and 'in' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for parboiling that I've seen is " Partly cooking".)