Sour, Tart, Vinegary
This page is the CodyCross answer for the clue below from Train Travel, Group 703, Puzzle 3 (Electric Traction).
Question is: Sour, Tart, Vinegary
and the answer is: ACIDIC
Word Meaning:
ACIDIC — Of or relating to acid; having the character of an acid.
Definitions from Wiktionary.