In __; Underway, at the Height of Activity

This page is the CodyCross answer for the clue below from The Netherlands, Group 2107, Puzzle 3 (Castle De Haar).

Question is: In __; Underway, at the Height of Activity

and the answer is: FULLSWING

Word Meaning:

FULL — Containing the maximum possible amount that can fit in the space available.

Definitions from Wiktionary.

In __; underway, at the height of activity — CodyCross Answer | CodyCross Solutions