Doing Up a Coat That Doesn't Have Buttons

This page is the CodyCross answer for the clue below from Larger than Life, Group 2159, Puzzle 1 (Giant Squid).

Question is: Doing Up a Coat That Doesn't Have Buttons

and the answer is: ZIPPING

Word Meaning:

ZIPPING — present participle and gerund of zip

Definitions from Wiktionary.