The Collaborative International Dictionary of English v.0.48:
Tidy \Ti"dy\, a. [Compar. Tidier; superl. Tidiest.] [From
Tide time, season; cf. D. tijdig timely, G. zeitig, Dan. &
1. Being in proper time; timely; seasonable; favorable; as,
tidy weather. [Obs.]
If weather be fair and tidy. --Tusser.
2. Arranged in good order; orderly; appropriate; neat; kept
in proper and becoming neatness, or habitually keeping
things so; as, a tidy lass; their dress is tidy; the
apartments are well furnished and tidy.
A tidy man, that tened [injured] me never. --Piers