There is a total of 285 clues beginning with oo
- Oolong or Darjeeling
 - Oolong or Earl Grey
 - Oolong or gunpowder
 - Oolong or oopak
 - Oolong or pekoe
 - Oolong or souchong
 - Oolong tea exporter
 - Oolong transporter
 - Oolong vessel
 - Oolong, eg
 - Oolong, et al
 - Oolong, for example
 - Oolong, for instance
 - Oolong, for one
 - Oolong, in Brit slang
 - Oolong, pekoe, etc
 - Oolong-growing nation
 - Oolong
 - Oom for one
 - Oom follower
 - Oom Paul of South Africa
 - Oom Paul was one
 - Oom Paul was one
 - Oom Paul, eg
 - Oom Paul, for example
 - Oom's partner in an Oktoberfest band
 - Oom- --
 - Oom- -- (tuba sound)
 - Oom- -- (tuba sounds)
 - Oom- -- band
 - Oom-pah maker
 - Oom-pah-pah boomers
 - Oom-pah-pah instrument
 - Oom-pah-pah-er
 - Oom-pah-paher
 - Oom-__ band
 - Oom-___
 - Oom-___ (polka rhythm)
 - Oom-___ (tuba sound)
 - Oom-___ (tuba sounds)
 - Oom-___ band
 - Oompa follower
 - Oompa Loompas' boss
 - Oompa ___
 - Oompa-Loompa creator
 - Oompa-Loompas creator
 - Oompa-Loompas' boss
 - Oompa-Loompas' creator
 - Oompa-__: Wonka worker
 - Oompah band instrument
 - Oompah band instruments
 - Oompah band member
 - Oompah band need
 - Oompah band tune
 - Oompah brass
 - Oompah horn
 - Oompah instrument
 - Oompah instruments
 - Oompah maker
 - Oompah makers
 - Oompah producers
 - Oompah sounder
 - Oompah- ____
 - Oompah-band tune
 - Oompah-pah instrument
 - Oompah-paher
 - Oomph
 - Oomph!
 - Oomph! degreaser brand
 - Ooms?
 - Oona Chaplin, née ___
 - Oona in "Chaplin"
 - Oona or Tip
 - Oona's father
 - OOO
 - OOO center
 - OOO, in love letters
 - OOO, sometimes
 - OOOO
 - OOOO, in letters
 - Oop of comics
 - Oop's abode
 - Oop's companion
 - Oop's gal
 - Oop's girlfriend
 - Oop's home
 - Oop's homeland
 - Oop's kingdom
 - Oop's love
 - Oop's main squeeze
 - Ooplasm containers
 - Ooplasm locale
 - OOPS
 - Oops!
 - Oops! sayers
 - Oops! utterer
 - Oops, she had a career
 - Oops, sorry
 - Oopsies
 - Oopsy or Funshine, eg