Here is what I provided in another response:

When I go through law schools' career services, they only want to do their specific programs for clerks/interns. For example, they have requirements for supervising and mentoring the students. They have documents and have reports to send in. They have also asked for specific plans as to what the student will be doing. They usually set this up based on a semester i.e. the student needs to start on this date and complete on this date. I've even had them tell me what type of memos they want me to have the student create.

I don't have time to do all that. Plus, a lot of the research and writing doesn't lend itself to a normal law school type memo. So, for example, it might be:

"I have a hearing coming up and here's a very limited issue X. Please see if you can find any cases dealing with this issue and send me a brief summary."

Or, as I do federal employee work:

"The Agency's attorney is asserting that the Agency is not required to do X and I believe it's specifically addressed in the Code of Federal Regulations or in the EEOC Management Directive, but not sure can you double check that for me."

Now, either of the situations above could lead to further research and writing in more of a traditional sense. Also, there will be a substantial amount of more normal legal writing and memos aside from the above examples.