Conversation so far:
What was notable about Adam Clayton's style?
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His style includes Motown and reggae influences, and cites artists such as Paul Simonon of The Clash as influences on his musical style.
Does he have any other influences?
As a bass player, Clayton's most recognizable basslines include "New Year's Day", which evolved out of an attempt to play Visage's song "Fade to Grey".
Are there any other interesting aspects about this article?
When Clayton first joined the fledgling U2, he did not have formal training in the bass.

Question: When did he get formal training?
Self-contained rewrite: When did Adam Clayton get formal training?