(a) The Mishnah refers to a case where the owner hires a laborer to help him spread out in the field the figs that he cuts. Alternatively, 'Lekatzos ba'Te'einim' might mean - to cut the figs with special knives known as 'Miktzo'os'.
(b) If the laborer stipulates that, in lieu of wages, he should be allowed to eat as he works, the Tana permits him to eat figs without having to Ma'aser them. We would we have thought that he is forbidden to do so - because it resembles a sale (which fixes for Ma'aser, as we have already learned).
(c) The reason that he isn't is - because the Torah permits him to eat without any stipulation.
(d) Should he stipulate that ...
1. ... his wife should be allowed to eat too, or his son, in lieu of his wages (see Tos. Yom-Tov) - then he is permitted to eat without Ma'asering, whereas they are not (see Tos. Yom-Tov).
2. ... he should be allowed to eat after he has finished working, as well - then he is permitted to eat as long as he is still working, but is obligated to Ma'aser first once he has finished.
(a) Our Mishnah concludes with the principle - that, regarding the above stipulation, whoever the Torah permits to eat may do so without Ma'asering, but whoever it does not, must Ma'aser first.
(b) A worker eats min ha'Torah in one of two cases. One of them is when he works with fruit that is attached to the ground at the time of 'G'mar Melachah'; the other - when he works with Talush before the 'G'mar Melachah'.
(a) The Mishnah - forbids a laborer to eat Benos-Sheva (good-quality figs) whilst he is working with Levasim (poor-quality ones) see Tos-Yom-Tov.
(b) Should he be eager to eat from the Benos Sheva, the Tana does permit him - to refrain from eating whilst he is working with the Levasim, in order to eat more of Benos-Sheva, once he gets there.
(a) If Reuven stipulates with Shimon that he will eat from the figs with which Shimon is working, and Shimon will eat from his, they are forbidden to eat figs witthout first Ma'asering them - because it is considered a sale.
(b) The Tana issues the same ruling with regard to 'Zeh Lik'tzos, ve'Zeh Lik'tzos' or 'Zeh Le'echol ve'Zeh Lik'tzos' - with reference to the large groups of pressed figs that are laid out in the field to dry (or that have been cut into small pieces [as opposed to those that he has picked]).
(c) Rebbi Yehudah argues by 'Lik'tzos' - because he holds that a sale before the G'mar Melachah does not fix for Ma'asros.
(d) We rule like - Rebbi Yehudah (see Tos. Yom-Tov and Tiferes Yisrael).