A Practice Before the Real Thing, an Experiment

This page is the CodyCross answer for the clue below from Inside the Spaceship, Group 1195, Puzzle 2 (Trivia Clues).

Question is: A Practice Before the Real Thing, an Experiment

and the answer is: TRIALRUN

Word Meaning:

TRIAL RUN — An empirical test of the suitability or effectiveness of a method or object by running it at least once.

Definitions from Wiktionary.