Answer:

marginal

Answer	Crossword Clue
MARGINAL	Barely adequate
MARGINAL	On the fringe
MARGINAL	Just adequate

MARGINAL	Barely covering production costs.
MARGINAL	Borderline.
MARGINAL	Minimal.
MARGINAL	Not quite fly-by-night
MARGINAL	At the fringe
MARGINAL	At the lower limit
MARGINAL	On spring's fringe?