This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Of, given to, characterized by, or having the nature of digression.

adj. Tending to digress.

adj. Prone to make excursions; wandering; roving; exploring.

Given to making excursions; rambling; wandering. Johnson.

Veering from point to point; wandering off from a subject; deviating; desultory; erratic: as, an excursive fancy or imagination.

adj. (of e.g. speech and writing) tending to depart from the main point or cover a wide range of subjects

"Fairford that the next day was the honourable Sabbath, he became extremely excursive in an attempt to exhort him to keep it holy."

indirect   

wandering    roving    exploring    discursive   

brilliant    making    large-cell    sat    footnote    waiting    unsystematic    pustular    operations    chinch