Answer: longo

AnswerCrossword Clue
LONGOStart and end of "O Sole Mio"
LONGOOboe's first sound
LONGOSound of "eau"
LONGOFeature of the word 'go'
LONGOVowel sound in "phone" and "home"
LONGOIt appears in droves
LONGOVowel sound in "drove"
LONGORococo repetition
LONGOVowel sound in "boat"
LONGOOpening opening?
LONGOO. Henry quality?
LONGOOvercoat opening?
LONGOOgre's head?
LONGO"Oh," phonetically
LONGOVowel sound in "rope" or "dope"
LONGOWhat gets Obama started?
LONGOEither vowel sound in "no-go"