Medical Condition Prevents Marching in the Army

This page is the CodyCross answer for the clue below from Department Store, Group 513, Puzzle 5 (Brand Advertising).

Question is: Medical Condition Prevents Marching in the Army

and the answer is: FLATFEET

Word Meaning:

FLAT FEET — (medicine) A physical condition where the soles of the feet are in full contact with the ground, either because the arches have collapsed or because they never developed.

Definitions from Wiktionary.