Start to print main story, editor implored (7)
I believe the answer is:
pleaded
'implored' is the definition.
The definition and answer can be both to do with communicating as well as being past participle verbs.
Perhaps there's an association between them I don't understand?
'start to print main story editor' is the wordplay.
'start to' suggests taking the first letters.
'main story' becomes 'lead' (I can't justify this - if you can you should give a lot more credence to this answer).
'editor' becomes 'ed'.
The initial letter of 'print' is 'p'.
'p'+'lead'+'ed'='PLEADED'
Can you help me to learn more?
(Other definitions for pleaded that I've seen before include "Appealed or requested earnestly" , "Made an emotional appeal" , "Begged" .)