Pack Your Belongings and Leave, in British Slang

This page is the CodyCross answer for the clue below from Forests, Group 1984, Puzzle 2 (Regeneration Zones).

Question is: Pack Your Belongings and Leave, in British Slang

and the answer is: UPSTICKS

Word Meaning:

UP STICKS — (UK, Ireland, sailing, slang) To put up the mast of a ship in preparation for sailing.

Definitions from Wiktionary.