Crosswordiee.com

% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Source of some allergies 4 letters:

PETS: Some allergy sources
DUST: Source of some allergies
POLLEN: Allergy source
CATHAIRS: Allergy source
HAY: Allergy source
NUT: Source of a common allergy