The phrase "good analogue" means finding something similar or comparable to another thing, that helps to explain or understand it better. Full definition
I think a very good analogue is literature, a book that you read as an adolescent will often carry a significantly different meaning if you read it later as an adult. (sbnation.com)
Though all subglacial lakes are good analogues for life beyond Earth, the hypersaline nature of the Devon lakes makes them particularly tantalizing analogues for ice - covered moons in our solar system. (sciencedaily.com)
Although the origin of the gamma rays is still being investigated, their discovery suggests the flaring behaviour of Cygnus X-3 is an even better analogue to that of quasars and other types of flaring galaxies known as «active galactic nuclei» (AGN) than previously thought. (newscientist.com)