Complex sentence: After a solid career in native Brazil, namely with Clube Atlético Mineiro, he moved to Portugal in 1999, joining Azores' C.D. Santa Clara; in January 2000 he signed for league powerhouse F.C. Porto, and went on to become an important offensive element.
Split into simpler sentences: After a solid career in native Brazil, namely with Clube Atlético Mineiro, Clayton moved to Portugal in 1999, joining Azores' C.D. Santa Clara. In January 2000, he moved to Portuguese League powerhouse F.C. Porto, and went on to become an important offensive element.