People with such a depression may still look happy (6)
I believe the answer is:
dimple
'people' is the definition.
The answer and definition can be both related to change as well as being verbs in their base form.
Maybe there's a link between them I don't understand?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for dimple that I've seen before include "Limped (anag.)" , "Slight depression (in the skin)" , "Attractive facila indentation" , "Attractive indentation in face" , "Small depression (in skin)" .)