I am working as developer in the current firm. We are developing a application for the organization. However for requirements and for other clarifications we need to approach so many other teams and many other people. Usually for those clarifications I used to approach my reporting manager.

However he is super busy with lot of things, and usually the inputs or clarifications are getting late from other teams. Since my manager is super busy he is sometimes becomes bottle neck for those clarifications and inputs. Sometimes I used to wait for those clarifications and sit idle without any work. But when those clarifications are inputs come I used to work more than usual working hours and used to slog in order to meet dead lines.

Hence I feel I would like to go beyond my manager and approach other teams or departments for those clarifications. How can I do gracefully without creating any rift with my manager?