I've Been Working on the __, All the Livelong Day
This page is the CodyCross answer for the clue below from Mexico, Group 1375, Puzzle 5 (Marietas Islands).
Question is: I've Been Working on the __, All the Livelong Day
and the answer is: RAILROAD
Word Meaning:
RAILROAD — (chiefly US, Philippines) A permanent track consisting of fixed metal rails to drive trains or similar motorized vehicles on.
Definitions from Wiktionary.