Call of __, Euphemism for Retiring to the Toilet

Puzzle 1 of Tennis Medium Pack

Question is: Call of __, Euphemism for Retiring to the Toilet

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.

Call Of __, Euphemism For Retiring To The Toilet Tennis Answers | CodyCross Solutions