Calling tables as variables in other variable

Min_Skill =
VAR Avg_Table =
// SUMMARIZE should NEVER be used to create
// aggregations. It can only ever be used
// to create groupings of rows from an extended
// table. This is the ONLY safe use of the function
// which is flawed and will not be fixed,
// as confirmed by Microsoft. But you don't need it
// here at all.
ADDCOLUMNS(
    DISTINCT( Survey_Table[Specific Skill/Industry] ),
    "@Avg_Score",
        CALCULATE(
            AVERAGEX(
                Survey_Table,
                [Latest_Score]
            )
        )
    )
VAR Min_Val_Skill =
    MINX(
        topn(
            1,
            Avg_Table,
            [@Avg_Score], ASC
        ),
        Survey_Table[Specific Skill/Industry]
    )
return
    Min_Val_Skill