肝 is built from the 月 and 干 components.
It reads カン like 干, as do 幹, 岸, 刊, and 汗 — learn 干 once and the family's reading comes with it.
A common word using 肝 is 肝心 (かんじん), meaning “essential, fundamental, crucial”.
Kanji that look similar include 肖, 明, 有, and 服.
