Crossword puzzle clue "on red"

What the red, red robin does

Red wine or red hue

Costar of "Red River" and "The Siege at Red River"

The red in red velvet cake, for one

Red Cross red cross, e.g.

Saw red, red bears bite (3,5)

Educator who once famously compared the lyrics of 2 Live Crew to Shakespeare's [sic] "O my luve's like a red, red rose"

Red socks, to the Red Sox