Piling up in capital style (8)
I believe the answer is:
accruing
'piling up' is the definition.
The answer and definition can be both related to change as well as being present participle verbs.
Perhaps there's a link between them I don't understand?
'in capital style' is the wordplay.
I cannot quite understand how this works, but
'in' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for accruing that I've seen is " Growing by adding to".)