Trying to hide the evidence of aging? (10)
I believe the answer is:
weathering
'evidence of aging?' is the definition.
The definition and answer can be both related to change as well as being present participle verbs.
Maybe you can see an association between them that I don't see?
'trying to hide the' is the wordplay.
'trying' becomes 'wearing' (both can mean stressful or demanding).
'to hide' is an insertion indicator.
'wearing' placed around 'the' is 'WEATHERING'.
Can you help me to learn more?
(Other definitions for weathering that I've seen before include "given exposure to elements" , "Enduring" , "coming through okay" .)