Solution for 2 July cryptic crossword clue

Wrote in legal form, completely absorbed in the job (9)

Solution – engrossed

The split in the clue is at the comma (unusual).  If you are "completely absorbed" in something you can be said to be "engrossed" by it.

And if you check the dictionary, you see that "engrossed" is also a legal term (now very old fashioned) for making a fair copy of a legal document – hence, "wrote in legal form".

This is an example of a double definition clue.  For more explanation of different clue types, please refer to the sidebar under the StumbleUpon button.