The Call of __, the Need to Use the Loo

This page is the CodyCross answer for the clue below from Seasons, Group 64, Puzzle 5 (High Summer).

Question is: The Call of __, the Need to Use the Loo

and the answer is: NATURE

Word Meaning:

NATURE — (uncountable, often capitalized) The way things are, the totality of all things in the physical universe and their order, especially the physical world in contrast to spiritual realms and flora and fauna as distinct from human conventions, art, and technology.

Definitions from Wiktionary.

The call of __, the need to use the loo — CodyCross Answer | CodyCross Solutions