In view of the fact that one's dating (6)
I believe the answer is:
seeing
'dating' is the definition.
('see' can be a synonym of 'date')
'in view of the fact that one's' is the wordplay.
I cannot really understand how this works, but
'in' is within the answer.
'view' could be 'see' (synonyms) and 'see' is found in the answer.
A single letter 'g' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for seeing that I've seen before include "Spotting - interviewing" , "since" , "Meeting" , "Vision" , "Noticing" .)