Source: The Great Interpretation of Dreams (Ibn Sirin)
(By analogy with a staff) A crutch in a dream indicates a man who is relied upon or a son who is leaned on. Leaning on it indicates dependence on others.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
A crutch indicates long life. It may indicate travel.
Source: Signs in the Science of Expressions (Ibn Shaheen)
A crutch is interpreted as goodness. Whoever sees himself leaning on one will attain goodness.