Getting fuller, fashionable folds (10)
I believe the answer is:
increasing
'getting fuller fashionable folds' is the definition.
I can't judge whether this definition defines the answer.
'getting fuller fashionable' is the wordplay.
'getting' means one lot of letters go next to another.
'fuller' becomes 'creasing' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'fashionable' becomes 'in' (in can mean fashionable or trendy).
'creasing' put after 'in' is 'INCREASING'.
Can you help me to learn more?
(Other definitions for increasing that I've seen before include "Making greater" , "on a larger scale?" , "Growing" .)