Clover was a Japanese toy company founded in 1973, right around the time of Popy toys. It went out of business 10 years later in 1983. Today it is mainly known as the sponsor of the original Gundam TV-series in 1979.
The show was mainly popular among older kids and young adults who didn't buy toys, and sales suffered as a result. Clover was partly responsible for canceling the show early because it didn't sell enough toys.
Also Clover's designs were not based on the finished version of the show and thus were not very accurate. Gundam ended up being very popular after it was re-edited into a movie-trilogy, but Clover's toys were still not a hit. Instead it was Bandai who capitalized on the show by selling model-kits that became extremely popular.
Gundam had started the Real Robot trend which changed the focus to "realistic" robots instead of the "super robots" which Clover were used to making. They tried to adapt to the new market by sponsoring shows such as Xabungle, Dunbine, and Srungle (the first 2 being directed by Gundam creator Yoshiyuki Tomino) but folded in 1983.