Here are the possible solutions for doctor's modern tool clue
Answer
Clue
Relevancy
laser
Clue
Doctor's modern tool
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
badcase
Clue
Robert Palmer "___ of Loving You (Doctor, Doctor)"
fez
Clue
Shriner-style hat favored by Matt Smith's "Doctor Who" character, the Doctor
Definition
a red brimless cap of wool or felt
jodie
Clue
___ Whittaker, player of the first female Doctor on "Doctor Who"