Wished to include a title in the document (7)
I believe the answer is:
desired
'wished' is the definition.
(desiring is a kind of wishing)
'title in the document' is the wordplay.
'title' becomes 'sir' (respectful address for a man).
'in the' is an insertion indicator.
'document' becomes 'deed' (deed is a kind of document).
'sir' put inside 'deed' is 'DESIRED'.
'to include a' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for desired that I've seen before include "Sought after" , "requested" , "Had aspired to" , "Wanted greatly" , "Wanted strongly" .)