Possible Clues:

• Hail Mary in prayer (3.5)
• Hail Mary prayer
• Work of Schubert maiden introduced in street song
• Mexican musician ignoring cold welcome next door to street's spiritual address
• Alternative name for Ellen's Third Song by Schubert
• Familiar name of Schubert's "Ellens dritter Gesang"
• Prayer to the Virgin Mary
• Religious salutation
• A very English mass, with song and prayer
• Prayer to the Blessed Virgin Mary, especially in the Rosary