In the Middle of the Action, Being in the __

This page is the CodyCross answer for the clue below from Underground Worlds, Group 2177, Puzzle 1 (Niagara Falls Tunnels).

Question is: In the Middle of the Action, Being in the __

and the answer is: THICKOFIT

Word Meaning:

THICK — Relatively great in extent from one surface to the opposite in its smallest solid dimension.

Definitions from Wiktionary.

In the middle of the action, being in the __ — CodyCross Answer | CodyCross Solutions