Modern fonts use the elements「sliding in crotch」with「tree, wood」that may be somewhat obscure at best, until learning that this glyph is related to that for「mulberry」(桑), and that the leaves of paper mulberry trees were used extensively as what is today termed「toilet paper, paper for one's toilet management」to mean a LONG STRIPE, such as an ass wipe STREAK on a soft leaf or two, or three, or some other sort of clean-up effort. The bunwad referent may also relate to the meaning of PASSAGE, and legal or contractual wording, or most anything prepared by lawyers.
Perhaps more understandable in the old elemental form of「head in crotch of spread feet, slowly descending」with「screwing emissions, woody」that would have referred to a LONG LINE OR TWO—either referring to the guys still waiting their turn in the queue, or, the stuff slowly descending in STRIPES of stuff slowly running down each leg or a raised and no-longer-integrated foot that has been put to use for some hours by the guys who were in the front of the line…or both.
「Sliding in crotch」with「tree wood」also describes wooden dildo use, a potential source of SPLINTERS from time to time. Perhaps refers to locating bone SPLINTERS while using the no-longer-integrated feet of a girl in dynastic China who was purchased or rented for erotic stimulation, and referred to SMALL PARTS, DETAILED ITEMS as splinters that the shaman may have missed when bludgeoning and pulverizing her metatarsals (see related glyph, 缺, using elements of 'meat packing thrust into cavity and pulling to one side'). Long, thin blood trails on each participant caused by the bone splinter, a STRIPE, a LONG LINE of something, such as blood STREAKS slowly descending from one or both of the service provider and/or client. Long lines of CONTRACTUAL TEXT as a much later meaning may be related to the legal ramifications of such a situation, determining liability calculating and damages, and so on.
…maybe the glyph was referring to tree-huggers who got snagged within their delicate zone (lumber-jacks?).
「Wood screwing emissions in crotch of spread feet」as one's LINEAGE, DESCENDANTS (a long line, perhaps) describing the only method known anciently of producing human offspring: sexual reproduction.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: strip; item; article; clause (of law or treaty); classifier for long thin things (ribbon, river, road, trousers etc)
Japanese EDRDG: article, clause, item, stripe, streak
Unihan extended: clause, condition; string, stripe