How large can your biceps gets before they really start to impede your racking of cleans on your shoulders? Assuming equal focus between tri’s and bi’s 15 inches cold, 16 inches cold, 17 inches cold etc?
If so would it make sense for someone who focuses on Olympic lifting and bodybuilding to do mainly triceps isolation exercises to body build and few bicep isolation exercises to body build the upper arms? Just rely on pull-ups and rows and gripping the bar for Olympic lifts to stimulate the biceps?
I’m not really sure I can give you a good answer on the first part of your question concerning cleans. I would tend to think that someone would have to have extremely large biceps to prevent them from racking cleans on their shoulders. I’m not sure of an exact measurement. I would probably say that elbow and wrist flexibility would have more to do with that than bicep size. Maybe someone could chime in an offer a better answer.
As for the second part of your question, if you’re relying on compound exercises for the bulk of your training such as deadlifts, rows, snatches, cleans, etc. then you probably wouldn’t need much, if any, addional arm work. Ultimately though, its your decision. If your arms are a weak point for you, then by all means prioritize them in your training. If not, then don’t train them for a while and see what happens. You might be surprised.