Answer:

isthmian

Answer	Crossword Clue
ISTHMIAN	Person from Panama
ISTHMIAN	Inhabitant of Panama area.
ISTHMIAN	Native of Panama.

ISTHMIAN	Pertaining to certain necks.
ISTHMIAN	Connecting two land masses

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.