Fill in the grid using the clues below.
Each word has four letters and starts with the last letter of the previous word.
In the box below, enter the keyword which is revealed across the center to unlock the next puzzle.

1. Owl's cry 2.Streettrain 3.Labyrinth 4.Therefore 5.Cry of pain
6.Beer ingredient 7.Lazy perosn 8.Weblog, in short 9.Lass 10.Solid earth
11.Unholster a gun 12. Magicians stick 13.Grime 14. Group of players
15. Planet 16.Naval prison.
Keyword clue: Military term