noun:
One who displays productive originality:
the creatives in the advertising department.
adjective:
1. Having the ability or power to create:
Human beings are creative animals.
2. Productive; creating.
3. Characterized by originality and expressiveness; imaginative:
creative writing.
synonyms: clever, demiurgic, deviceful, fertile, formative, gifted, ingenious, innovational, innovative, innovatory, inspired, inventive, leading-edge, original, originative, productive, prolific, stimulating, visionary, way out
As found at Dictionary.com.