Associated with altered appearance (7)
I believe the answer is:
related
'associated' is the definition.
(relating is a kind of associating)
'altered appearance' is the wordplay.
'altered' can be anagrammed to 'RELATED'.
But, I'm not clear how this is indicated.
'with' is the link.
Can you help me to learn more?
(Other definitions for related that I've seen before include "Told in detail, being connected" , "Narrated; connected" , "Told; akin" , "spilled the beans" , "of one family" .)