A Type of Action, Generally Defensive in Nature

This page is the CodyCross answer for the clue below from Small World, Group 690, Puzzle 3 (Dust Particles).

Question is: A Type of Action, Generally Defensive in Nature

and the answer is: REARGUARD

Word Meaning:

REARGUARD — (military) The rearmost part of a force, especially a detachment of troops that protect the rear of a retreating force.

Definitions from Wiktionary.