Crossword puzzle clue "actor's hint"

Hint (and a hint to this puzzle's theme)

"Mrs. Frisby and the Rats of ___" (classic 1971 children's book based on experiments at the National Insistute of Mental Health, hint hint)

Something your poetry teacher might assign you to write about a particularly inspirational poetry teacher you've had *hint* *hint

Actor Cameron + actor Fairbanks = actor ___

Actor Gulager whose name sounds like a crossword hint

Actor's hint

Actor with actor brothers

Actor John or his actor son Sean