He has, for instance, been a strong advocate against wage cuts.
The Sun
She was always a strong advocate for consumers, as well as for students.
Times, Sunday Times
I was a strong advocate of him being appointed two years ago.
The Sun
I am a strong advocate of overseas aid.
Times, Sunday Times
Years ago when we were choosing an architect, one trustee was a strong advocate for a world-class architect, but another trustee criticized this architect's work.
Christianity Today