Marking some for addressee in Gorey (6)
I believe the answer is:
seeing
'marking' is the definition.
The answer and definition can be both related to thinking as well as being present participle verbs.
Maybe you can see an association between them that I don't see?
'some for addressee in gorey' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'SEEING' is hidden within 'for addressee in gorey'.
Can you help me to learn more?
(Other definitions for seeing that I've seen before include "Vision" , "Spotting - interviewing" , "Noticing" , "since" , "Observing - understanding" .)