Here are the possible solutions for prof's pointer clue
Answer
Clue
Relevancy
laser
Clue
Prof's pointer
Definition
a source of high-intensity optical, infrared, or ultraviolet radiation produced as a result of stimulated emission maintained within a solid, liquid, or gaseous medium
ntile
Clue
Scrabble 1-pointer (but a Words With Friends 2-pointer)
alum
Clue
Visitor to an old prof, perhaps
Prof's visitor, maybe
Visitor to an old prof
Definition
a sulphate of ammonium and potassium, used as a mordant