Note simple treatment for depressions (7)
I believe the answer is:
dimples
'depressions' is the definition.
(dimple is a kind of depression)
'note simple treatment' is the wordplay.
'note' becomes 'd' (musical note**).
'treatment' is an anagram indicator.
'simple' anagrammed gives 'imples'.
'd'+'imples'='DIMPLES'
'for' is the link.
(Other definitions for dimples that I've seen before include "Indentations on the cheeks" , "Hollows in the cheek or chin" , "Attractive indentations in face" .)