Nothing to __, Quickest Route Through Customs

This page is the CodyCross answer for the clue below from Nordic Wonders, Group 1945, Puzzle 2 (Ice Cave Tours).

Question is: Nothing to __, Quickest Route Through Customs

and the answer is: DECLARE

Word Meaning:

DECLARE — (obsolete, transitive) To make clear, explain, interpret.

Definitions from Wiktionary.