Used for concealment purposes, 5 letters
Keeping under wraps, 6 letters
On the lam, perhaps, 6 letters
You could go into it, 6 letters
Make undecipherable or imperceptible by obscuring or concealing, 6 letters
Cover as if with a shroud, 6 letters
The activity of keeping something secret, 6 letters
Prevent from being seen or discovered, 6 letters
Theme of this puzzle, seen seven times in the grid, 9 letters
What briar patches may be doing?, 13 letters