secondary (the usual work)

extra; supplementary

correct for the occasion or purpose

suitable

giving additional help or support

supplementary

secondary or subordinate but from the same source

indirect, secondary

connected (with the topic, problem, person etc receiving attention)

appropriate; to the purpose

having, showing, trust or dependence

dependent

(a person, business etc) not as important, high in position etc as the main person, business etc

secondary, helpful