Happy to make appeals to the Editor (7)
I believe the answer is:
Here is my best explanation:
'happy' is the definition.
('pleased' can be a synonym of 'happy')
'appeals to the editor' is the subsidiary indication.
'appeals' becomes 'pleas' (plea is a kind of appeal).
'to the editor' becomes 'ed'.
'to make' is the link.
(Other definitions for pleased that I've seen before include "Well satisfied", "Gratified", "Happy, satisfied", "like Punch?", "Delighted; grateful", "Feeling satisfaction", "Grateful, delighted", "content?", "Euphoric" and "Content".)