Difficult Decision

This page is the CodyCross answer for the clue below from Physics, Group 1894, Puzzle 1 (Cathode-Ray Tube).

Question is: Difficult Decision

and the answer is: TOUGHCALL

Word Meaning:

TOUGH CALL — (chiefly US, idiomatic) A choice or judgment which is difficult to make, especially one involving only two alternatives.

Definitions from Wiktionary.