Fixing twist also in some jewellery (7)
I believe the answer is:
rooting
'fixing' is the definition.
The answer and definition can be both related to change as well as being present participle verbs.
Perhaps you can see a link between them that I don't see?
'twist also in some jewellery' is the wordplay.
'twist' says the letters should be written backwards (I've seen 'twisting of' mean this (letters twist back)).
'also' becomes 'too' (synonyms).
'in' is an insertion indicator.
'some jewellery' becomes 'ring' (ring is a kind of jewellery).
'too' reversed gives 'oot'.
'oot' placed within 'ring' is 'ROOTING'.
Can you help me to learn more?
(Other definitions for rooting that I've seen before include "Implanting deeply" , "Rummaging" .)