"Have a feel for something" is an idiom that is commonly used to describe the ability to understand or be familiar with a particular subject or activity. There are numerous synonyms for this phrase, including "have an understanding of," "grasp," "comprehend," "have a knack for," "be attuned to," "be sensitive to," "have a talent for," "have an intuition for," and "have a sense of." All of these phrases imply a level of mastery or expertise in a certain area and suggest that someone is able to perceive and interpret the nuances and complexities of a given activity or subject matter.